Não informado. (1989). Current Opinion in Obstetrics and Gynecology. Rapid Science Publishers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Current Opinion in Obstetrics and Gynecology. London: Rapid Science Publishers, 1989.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Current Opinion in Obstetrics and Gynecology. Rapid Science Publishers, 1989.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.