Não informado. (2016). The Year Book of Obstetrics and Gynecology. Year Book Medical Publishers.
Lua i Stíl Chicago (17ú heag.)Não informado. The Year Book of Obstetrics and Gynecology. Chicago, Ill: Year Book Medical Publishers, 2016.
Lua MLA (8ú heag.)Não informado. The Year Book of Obstetrics and Gynecology. Year Book Medical Publishers, 2016.
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