Não informado. (2003). Quarterly Review of Obstetrics and Gynecology. Washington Institute of Medicine.
Lua i Stíl Chicago (17ú heag.)Não informado. Quarterly Review of Obstetrics and Gynecology. Washington: Washington Institute of Medicine, 2003.
Lua MLA (8ú heag.)Não informado. Quarterly Review of Obstetrics and Gynecology. Washington Institute of Medicine, 2003.
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