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How to Cite Legal Sources Properly & Reduce Turnitin Similarity Score

Lawkagyan February 08, 2025

 How to Properly Cite Legal Sources to Reduce 

Turnitin Similarity

Introduction

Legal research and academic writing demand accuracy, credibility, and proper citation. A common challenge faced by law students, researchers, and legal professionals is Turnitin similarity—a high percentage can indicate plagiarism, even when unintentional.


But why does legal writing often trigger Turnitin’s similarity checker? The reason lies in the frequent use of case law, legal statutes, and journal references, which often appear word-for-word in multiple sources. Proper citation techniques can reduce similarity scores and maintain academic integrity while ensuring your work remains well-referenced.

In this guide, we’ll cover the best legal citation practices to reduce Turnitin similarity, explore various citation styles, and provide practical solutions for law students and researchers.

Understanding Turnitin Similarity in Legal Writing

What is Turnitin and How Does It Work?

Turnitin is a plagiarism detection tool used by academic institutions worldwide. It scans documents against:

  • Published journals, books, and legal research papers
  • Academic databases and student submissions
  • Legal case law, statutes, and government reports

Turnitin assigns a similarity score, which represents the percentage of text matching existing sources. While high similarity does not always mean plagiarism, it can indicate improper citation, excessive quoting, or lack of paraphrasing.

How Turnitin Detects Similarity in Legal Research Papers

Turnitin’s algorithm detects:

  1. Exact matches to existing sources (case law, statutes, journal articles).
  1. Poor paraphrasing or rewording of legal texts.
  1. Excessive direct quotations without proper citations.
  1. Incorrect formatting of citations, leading to flagged content.

Why Legal Writing Often Has High Similarity Scores

Legal documents frequently have high similarity scores due to:

  • Use of case law citations (which are often identical across different papers).
  • Standardized legal language (e.g., “Fundamental Rights under Article 21”).
  • Extensive referencing of legal precedents and statutes.
  • Quoting official reports and judgments verbatim.

Difference Between Plagiarism and Proper Citation

  • Plagiarism: Using another person’s work without acknowledgment.
  • Proper Citation: Giving due credit and referencing the original source using a recognized format.

Even properly cited content may contribute to high similarity in Turnitin, but most universities exclude citations and references from similarity checks when properly formatted.

Why Proper Citation is Essential in Legal Writing

✅ 1. Maintaining Academic Integrity

  • Proper citation ensures that legal research upholds ethical standards.
  • Avoids misrepresentation of ideas as original work.

✅ 2. Avoiding Plagiarism Accusations

  • Even accidental plagiarism can result in penalties, disqualification, or academic failure.
  • Proper citation protects against legal and ethical violations.

✅ 3. Enhancing Credibility and Professionalism

  • Well-cited research papers demonstrate expertise and thorough research.
  • Establishes authority and authenticity in legal arguments.

✅ 4. Providing Readers Access to Original Sources

  • Enables fact-checking and deeper research by readers and reviewers.
  • Ensures transparency in legal arguments and conclusions.

Common Citation Styles for Legal Writing

Different legal systems use different citation styles to ensure uniformity in referencing sources.

1. Bluebook Citation Style (U.S.)

  • Used in U.S. law schools, courts, and legal publications.
  • Example: Brown v. Board of Education, 347 U.S. 483 (1954).

2. OSCOLA (Oxford University Standard for Citation of Legal Authorities - UK)

  • Used in UK and Commonwealth legal research.
  • Example: Donoghue v Stevenson [1932] AC 562 (HL).

3. APA & MLA for Interdisciplinary Legal Studies

  • APA (American Psychological Association): Used for legal research within social sciences.
  • MLA (Modern Language Association): Common in humanities and legal history.

4. Indian Citation Standards

  • Indian legal writing follows Bluebook or journal-specific guidelines.
  • Example: Kesavananda Bharati v. State of Kerala, AIR 1973 SC 1461.

5. Chicago Style for Legal History and Research

  • Used in legal history and policy papers.
  • Includes footnotes and bibliography for references.

How to Properly Cite Legal Sources to Reduce Turnitin Similarity

1. Case Law Citation

Proper citation of judicial decisions helps in reducing similarity scores.

Bluebook Format (U.S.)

  • Miranda v. Arizona, 384 U.S. 436 (1966).

OSCOLA (UK Law Citation)

  • R v Smith [2006] 1 AC 495 (HL).

Indian Citation Format

  • Maneka Gandhi v. Union of India, AIR 1978 SC 597.

2. Statutes and Legal Codes

  • U.S. Citation: 18 U.S.C. § 242 (2020).
  • UK Citation: Human Rights Act 1998, s 2(1).
  • India Citation: Constitution of India, Article 21.

3. Books and Treatises in Legal Writing

  • Bluebook: Smith, John. Legal Research and Writing (3rd edn, Oxford 2020).
  • OSCOLA: Roe, Jane. The Law of Contracts (Oxford University Press 2019).

4. Journal Articles and Law Reviews

  • APA: Sharma, P. (2021). "Judicial Activism in India." Harvard Law Review, 134(3), 112-145.
  • OSCOLA: Lastname, A., ‘The Evolution of Constitutional Law’ (2020) 5(2) Oxford Journal of Legal Studies 45.

Tips to Reduce Turnitin Similarity in Legal Writing

✅ Use quotation marks for direct quotes.

✅ Paraphrase legal principles while maintaining accuracy.

✅ Cite the source every time you use an idea from another work.

✅ Use footnotes and bibliography as required.

✅ Avoid copying verbatim even when citing case law.

Best Legal Citation Management Tools

🖥 Zotero – Free reference manager.

📖 Mendeley – Best for academic papers.

📑 EndNote – Comprehensive citation software.

🗂 RefWorks – Cloud-based citation manager.

How Law Students and Researchers Can Check Citation

 Accuracy

🔍 Self-Checking Citations Before Submission

  • Manually verifying citations with standard legal citation guides.

📖 Cross-Referencing with Official Citation Guides

  • Using Bluebook, OSCOLA, and other official guides for accuracy.

🛠 Using Turnitin’s Exclusion Settings for References

  • Some universities allow exclusions for properly cited references.

Conclusion

Properly citing legal sources is critical for reducing Turnitin similarity and maintaining academic integrity. By following the right citation styles, using trusted citation tools, and practicing effective paraphrasing, you can create original, well-referenced legal documents without plagiarism concerns.

FAQs

1. What is the best citation style for legal writing?

  • Bluebook for U.S., OSCOLA for the UK, and Indian Citation Style for Indian law.

2. Does Turnitin count properly cited sources as plagiarism?

  • No, if citations are formatted correctly, universities can exclude them from the similarity report.

3. How can I cite case law correctly in my research paper?

  • Follow Bluebook (U.S.), OSCOLA (UK), or Indian legal citation formats.

4. What tools can I use to manage legal citations efficiently?

  • Zotero, Mendeley, and EndNote.

5. How do I paraphrase legal text without increasing Turnitin similarity?

  • Rephrase in your own words while maintaining accuracy and cite the source properly.

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