APA (7th ed.) Citation

Marshall, B., McCallum, R. W., & Guerrant, R. L. (1991). Helicobacter pylori in peptic ulceration and gastritis. Blackwell Scientific Publications.

Chicago Style (17th ed.) Citation

Marshall, Barry, Richard W. McCallum, and Richard L. Guerrant. Helicobacter Pylori in Peptic Ulceration and Gastritis. Boston: Blackwell Scientific Publications, 1991.

MLA (9th ed.) Citation

Marshall, Barry, et al. Helicobacter Pylori in Peptic Ulceration and Gastritis. Blackwell Scientific Publications, 1991.