APA (7th ed.) Citation

AS, A., CS, P., E, T., G, O., & BC, S. (1981). Gastrointestinal bleeding in the elderly. Morbidity, mortality and cause. American journal of surgery, 142(2), 271. https://doi.org/10.1016/0002-9610(81)90291-9

Chicago Style (17th ed.) Citation

AS, Antler, Pitchumoni CS, Thomas E, Orangio G, and Scanlan BC. "Gastrointestinal Bleeding in the Elderly. Morbidity, Mortality and Cause." American Journal of Surgery 142, no. 2 (1981): 271. https://doi.org/10.1016/0002-9610(81)90291-9.

MLA (9th ed.) Citation

AS, Antler, et al. "Gastrointestinal Bleeding in the Elderly. Morbidity, Mortality and Cause." American Journal of Surgery, vol. 142, no. 2, 1981, p. 271, https://doi.org/10.1016/0002-9610(81)90291-9.