Não informado. (1980). Postgraduate Obstetrics & Gynecology. Postgraduate Obstetrics & Gynecology.
Cita Chicago Style (17a ed.)Não informado. Postgraduate Obstetrics & Gynecology. Philadelphia, Pa: Postgraduate Obstetrics & Gynecology, 1980.
Cita MLA (8a ed.)Não informado. Postgraduate Obstetrics & Gynecology. Postgraduate Obstetrics & Gynecology, 1980.
Precaución: Estas citas no son 100% exactas.