APA-Zitierstil (7. Ausg.)

Não informado. (1980). Postgraduate Obstetrics & Gynecology. Postgraduate Obstetrics & Gynecology.

Chicago-Zitierstil (17. Ausg.)

Não informado. Postgraduate Obstetrics & Gynecology. Philadelphia, Pa: Postgraduate Obstetrics & Gynecology, 1980.

MLA-Zitierstil (8. Ausg.)

Não informado. Postgraduate Obstetrics & Gynecology. Postgraduate Obstetrics & Gynecology, 1980.

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.