APA (7th ed.) Citation

Farmer, R. G., Achkar, E., & Fleshler, B. (1983). Clinical gastroenterology. Raven Press.

Chicago Style (17th ed.) Citation

Farmer, Richard Gilbert, Edgar Achkar, and Bertram Fleshler. Clinical Gastroenterology. New York: Raven Press, 1983.

MLA (9th ed.) Citation

Farmer, Richard Gilbert, et al. Clinical Gastroenterology. Raven Press, 1983.