APA (7th ed.) Citation

National Gastroenterological Association (U.S.) & American College of Gastroenterology. (1954). The American journal of gastroenterology. National Gastroenterological Association.

Chicago Style (17th ed.) Citation

National Gastroenterological Association (U.S.) and American College of Gastroenterology. The American Journal of Gastroenterology. [New York]: National Gastroenterological Association, 1954.

MLA (9th ed.) Citation

National Gastroenterological Association (U.S.) and American College of Gastroenterology. The American Journal of Gastroenterology. National Gastroenterological Association, 1954.