Não informado. (2016). The Year Book of Obstetrics and Gynecology. Year Book Medical Publishers.
Chicago-Zitierstil (17. Ausg.)Não informado. The Year Book of Obstetrics and Gynecology. Chicago, Ill: Year Book Medical Publishers, 2016.
MLA-Zitierstil (8. Ausg.)Não informado. The Year Book of Obstetrics and Gynecology. Year Book Medical Publishers, 2016.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.