Não informado. (2015). Core Journals in Obstetrics/Gynecology. Excerpta Medica.
Lua i Stíl Chicago (17ú heag.)Não informado. Core Journals in Obstetrics/Gynecology. Amsterdam: Excerpta Medica, 2015.
Lua MLA (8ú heag.)Não informado. Core Journals in Obstetrics/Gynecology. Excerpta Medica, 2015.
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