Não informado. (1989). Current Opinion in Obstetrics and Gynecology. Rapid Science Publishers.
Lua i Stíl Chicago (17ú heag.)Não informado. Current Opinion in Obstetrics and Gynecology. London: Rapid Science Publishers, 1989.
Lua MLA (8ú heag.)Não informado. Current Opinion in Obstetrics and Gynecology. Rapid Science Publishers, 1989.
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