AMA Style Guide: Citing Online Resources

Template

Author(s). Chapter title. In: Editor(s). Book Title. [Edition number, if it is the second edition or above] ed. Publisher's name; copyright year:inclusive pages. Accessed [date]. URL or DOI URL

NOTE: There is no period after the URL.

Example

​Haine CL. The ophthalmic case historian. In: Benjamin WJ, Borish IM, eds. Borish's Clinical Refraction. 2nd ed. Elsevier; 2006:195-216. Accessed April 23, 2019. https://www-sciencedirect-com.eproxy.ketchum.edu/science/article/pii/B9780750675246500119

Template

Author(s). Title. Journal Name [using NLM abbreviations]. Year;vol(issue No.):inclusive pages. URL or doi:

NOTE: 

• There is no period after the doi or URL.
• The DOI is preferable to a URL
• Use permalinks or stable links (avoid a search result link if possible)

Example

Sánchez-Armendáriz K, García-Gil A, Romero CA, et al. Oral vitamin D3 5000 IU/day as an adjuvant in the treatment of atopic dermatitis: a randomized control trial. Int J Dermatol. 2018;57(12):1516-1520. doi:1111/ijd.14220

Template

Author(s). Title. Institution. Publication Date. Accessed Date. URL or doi

Example

Diagnosis and Treatment of Low Back Pain Work Group. VA/DoD clinical practice guideline for diagnosis and treatment of low back pain, Version 3.0. Department of Veterans Affairs, Department of Defense. February 2022. Accessed January 14, 2024. https://www.spine.org/Portals/0/assets/downloads/ResearchClinicalCare/Guidelines/LowBackPain.pdf

Template

Author(s), if given (skip if not given). Title of the specific item/page cited. Name of the Web site. [Published date]. Updated [date]. Accessed [date]. URL

NOTE:

• Omit Published and/or Updated date if not available.
• There is no period after the URL.

Examples

Charlton G. Internal linking for SEO: examples and best practices. SearchEngineWatch. Accessed February 10, 2016. https://searchenginewatch.com/sew/how-to/2428041/internal-linking-for-seo-examples-and-best-practices

Zika travel information. Centers for Disease Control and Prevention. January 26, 2016. Updated August 11, 2016. Accessed June 18, 2019. https://wwwnc-cdc-gov.eproxy.ketchum.edu/travel/page/zika-travel-information

Template

Author(s) if applicable. Name of monograph or document. Database name. Company (or vendor) maintaining the database. Accessed Date. URL

NOTE: 

• There is no period after the URL.

Examples

Facts and Comparisons

Tiotropium Bromide Oral Inhalation. Facts & Comparisons. Wolters Kluwer Clinical Drug Information, Inc. Accessed April 23, 2020. https://fco.factsandcomparisons.com

Micromedex

Adult Dosing. IBM Micromedex. Truven Health Analytics. Accessed April 23, 2020. https://www.micromedexsolutions.com/

Package inserts, patient information, and prescribing information can be cited as follows:

Template

Medication Name. the phrase Prescribing information, Patient information, or Package insert. Manufacturer’s Name; Year. Accessed Date. URL

NOTE: There is no period after the URL.

Examples

Zithromax. Prescribing information. Pfizer; 2017. Accessed June 23, 2020. https://www.pfizermedicalinformation.com/en-us/zithromax

Azilect. Package insert. Teva Pharmaceuticals Inc; 2014. Accessed June 23, 2020. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=e802c83c-e581-4a11-b83d-1df47120078d

Some suggestions for citing various popular social media are as follows:

NOTE: Social media content is fluid and temporary, and in scientific reporting, a better resource is likely available. 

Examples

Facebook

Mayo Clinic Sports Medicine Facebook page. #RotatorCuff tears are among the most common shoulder injuries, particularly in individuals who engage in activities that require repetitive arm motions. Discover the possible treatment options for a torn rotator cuff: https://mayocl.in/2H6AR3P. Accessed March 4, 2019. https://www.facebook.com/mayoclinicsportsmedicine

Blog

Gray T. Advice after mischief is like medicine after death. AMA Style Insider blog. February 11, 2019. Accessed March 10, 2019. https://amastyleinsider.com/2019/02/11/advice-after-mischief-is-like-medicine-after-death/

YouTube

Khan Academy health and medicine YouTube page. Accessed February 10, 2016. https://www.youtube.com/user/khanacademymedicine

Twitter

@AMAManual. Double negatives can be used to express a positive, but this yields a weaker affirmative than the simpler positive and may be confusing. “Our results are not inconsistent with the prior hypothesis.” “That won’t do you no good.” And the classic: “I can’t get no satisfaction.” March 7, 2019. Accessed March 10, 2019. https://twitter.com/AMAManual/status/1103678998327017483

AMA does not provide specific information for citing images, however you should always give an attribution line under images used in your work. Standard items to include in an attribution line are:

• Title
• Image source (book, website, etc.)
• Source URL if possible
• Date of Publication
• License