APA
(1968). Journal of gastroenterology abstracts and citations. New York: National institute of arthritis and metabolic disease.
Chicago
1968. Journal of gastroenterology abstracts and citations. New York: National institute of arthritis and metabolic disease.
Harvard
(1968). Journal of gastroenterology abstracts and citations. New York: National institute of arthritis and metabolic disease.
MLA
Journal of gastroenterology abstracts and citations. New York: National institute of arthritis and metabolic disease. 1968.
