AMA Citation (11th Edition) Help

This guide was created as a basic guide for using AMA Manual of Style, 11th edition. Some of the health science fields such as physician assistants and physical therapy use the AMA Manual of Style.

Examples for Clinical Trials

1. Evaluation of phage therapy for the treatment of Escherichia coli and Pseudomonas aeruginosa wound infections in burned patients (PHAGOBURN). ClinicalTrials.gov identifier: NCT02112010. Updated July 23, 2015. Accessed October 13, 2019. http://www.clinicaltrials.gov/ct2/show/NCT02116010

2. German Cancer Research Center. Use of acetylsalicylic acid (ASA) for enhanced early detected of colorectal neoplasms. EudraCT identifier: 2011-005603-32/DE. Posted May 30, 2012. Accessed November 2, 2019. https://www.clinicaltrialsregister.eu/ctr-search/trial/2011-005603-32/DE

 

If the trial results are published in a journal, you should cite it as an article: 

Ocvirk J, Moltara ME, Mesti T, et al. Bevacizumab plus chemotherapy in elderly patients with previously untreated metastatic colorectal cancer: single center experience. Radiol Oncol. 2016;50(2):226-231. doi:10.1515/raon-2015-0030

General guidelines

  • Include the date the trial information was created or updated. If you know the date the website was created, place it after the URL. However, if you know the date it was updated, place that date after the URL instead and include the word "Updated." The updated date takes precedence over the created date. You do not need to include both.

  • Always put the date that you accessed the resource. Include the word "Accessed."    

 

For more information, consult the AMA Manual of Style chapter on databases. 

Information Needed

You will need (minimum information in bold):

  • Title of the trial 
  • Trial registry identifier: Common trial registries: ClinicalTrials.gov(US)isrctn.org(UK), anzctr.org.au (Australia and New Zealand), trialregister.nl (Netherlands), umin.ac.jp/ct (Japan), EU Clinical Trials Register/EudraCT (Europe). 
  • Date the website was created or updated. 
  • Accessed date
  • URL