APA (7th ed.) Citation

RS, S. (1984). Primary gastric lymphoma: A review. The American journal of gastroenterology, 79(1), 21.

Chicago Style (17th ed.) Citation

RS, Sandler. "Primary Gastric Lymphoma: A Review." The American Journal of Gastroenterology 79, no. 1 (1984): 21.

MLA (9th ed.) Citation

RS, Sandler. "Primary Gastric Lymphoma: A Review." The American Journal of Gastroenterology, vol. 79, no. 1, 1984, p. 21.