APA (7th ed.) Citation

Bockus, H. L., & Berk, J. E. (1974). Gastroenterology (3rd ed.). Saunders.

Chicago Style (17th ed.) Citation

Bockus, Henry L., and J. Edward Berk. Gastroenterology. 3rd ed. Philadelphia [etc.]: Saunders, 1974.

MLA (9th ed.) Citation

Bockus, Henry L., and J. Edward Berk. Gastroenterology. 3rd ed. Saunders, 1974.