APA引文

(1998). Essentials of obstetrics and gynecology. Philadelphia, Pa: Saunders.

Trích dẫn kiểu Chicago

Essentials of Obstetrics and Gynecology. Philadelphia, Pa: Saunders, 1998.

MLA引文

Essentials of Obstetrics and Gynecology. Philadelphia, Pa: Saunders, 1998.

警告：这些引文格式不一定是100％准确.