APA (7th ed.) Citation

Firth, J. D., & Collier, J. D. (2004). Gastroenterology and hepatology. Royal College of Physicians.

Chicago Style (17th ed.) Citation

Firth, John D., and Jane D. Collier. Gastroenterology and Hepatology. London: Royal College of Physicians, 2004.

MLA (9th ed.) Citation

Firth, John D., and Jane D. Collier. Gastroenterology and Hepatology. Royal College of Physicians, 2004.

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