Não informado. (2000). Transactions of the American Association of Obstetricians and Gynecologists. American Association of Obstetricians and Gynecologists.
Chicago-referens (17:e uppl.)Não informado. Transactions of the American Association of Obstetricians and Gynecologists. Philadelphia, Pa: American Association of Obstetricians and Gynecologists, 2000.
MLA-referens (8:e uppl.)Não informado. Transactions of the American Association of Obstetricians and Gynecologists. American Association of Obstetricians and Gynecologists, 2000.
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