APA引文

(2004). Essentials of obstetrics and gynecology. Philadelphia, Pa: Saunders.

Trích dẫn kiểu Chicago

Essentials of Obstetrics and Gynecology. Philadelphia, Pa: Saunders, 2004.

MLA引文

Essentials of Obstetrics and Gynecology. Philadelphia, Pa: Saunders, 2004.

警告：这些引文格式不一定是100％准确.