Doll, R., Kinlen, L., & Skegg, D. (1976). Letter: Incidence of endometrical carcinoma.
芝加哥风格引文Doll, R., L. Kinlen, 与 D. Skegg. Letter: Incidence of Endometrical Carcinoma. 1976.
MLA引文Doll, R., et al. Letter: Incidence of Endometrical Carcinoma. 1976.
警告：这些引文格式不一定是100％准确.