Não informado. (1973). European Journal of Obstetrics & Gynecology and Reproductive Biology. Elsevier Science Publishers.
Chicago-referens (17:e uppl.)Não informado. European Journal of Obstetrics & Gynecology and Reproductive Biology. Amsterdam: Elsevier Science Publishers, 1973.
MLA-referens (8:e uppl.)Não informado. European Journal of Obstetrics & Gynecology and Reproductive Biology. Elsevier Science Publishers, 1973.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.