APA (7th ed.) Citation

Crooks, C. J. (2013). The epidemiology of upper gastrointestinal bleeding.

Chicago Style (17th ed.) Citation

Crooks, Colin J. The Epidemiology of Upper Gastrointestinal Bleeding. 2013.

MLA (9th ed.) Citation

Crooks, Colin J. The Epidemiology of Upper Gastrointestinal Bleeding. 2013.

Warning: These citations may not always be 100% accurate.