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APA Citation Style 7th Ed. (other styles too)


The APA citation style does not seem to make specific provision for citing clinical trials. Your librarians have suggested the following - please discuss with your lecturer or supervisor before submission.


Author Date Clinical Trial Title Identifier No. URL

Brown, A.E.

National Library of Medicine.

(2000, May 17 - 2020 May 17).

Title of the Trial.


capitalize only the first word and proper nouns.

Identifier NCT00103181.



Clinical Trials Citation Examples

Clinical Trials

  • trial from with no completion date
 National Library of Medicine (U.S.). (2005, March - ). Radiation therapy (WBI versus PBI) in treating women who have undergone surgery for ductal carcinoma in situ or stage I or stage II breast cancer. Identifier NCT00103181.
  • trial from with a completion date and named investigators
 Soh, A.Y.S., & Wang, Y.T. (2018, May 7 - 2019, May 7). Changes in microbiota and metabolomic profile between Rifaximin responders and non-responders in diarrhoea-predominant irritable bowel syndrome. Identifier NCT03557788.



Suggested In Text Citation for Organizational author

1st In Text Citation

  • disease must be unifocal (National Library of Medicine [NLM], NCT00103181).

Subsequent In Text citations

  • as indicated by Patient 33 (NLM, NCT00103181).