APA (7e ed.) Bronvermelding

Não informado. (1977). Current problems in obstetrics and gynecology. Year Book Medical Publishers.

Chicago (17e ed.) Bronvermelding

Não informado. Current Problems in Obstetrics and Gynecology. Chicago, Ill: Year Book Medical Publishers, 1977.

MLA (8e ed.) Bronvermelding

Não informado. Current Problems in Obstetrics and Gynecology. Year Book Medical Publishers, 1977.

Let op: Deze citaties zijn niet altijd 100% accuraat.