APA引文

Johnston, P. W., & Weinberg, J. A. (1956). BILLROTH I RESECTION FOR PEPTIC ULCER.

Citação norma Chicago

Johnston, Paul W., and Joseph A. Weinberg. BILLROTH I RESECTION FOR PEPTIC ULCER. 1956.

MLA引文

Johnston, Paul W., and Joseph A. Weinberg. BILLROTH I RESECTION FOR PEPTIC ULCER. 1956.

警告：這些引文格式不一定是100％准確.