Gaya APA

Norwitz, E, R., Schorge, J, O. (2001). Obstetrics and Gynecology at a Glance . : Blackwell Publishing,.

Gaya MLA

Norwitz, Errol, R., Schorge, John, O. "Obstetrics and Gynecology at a Glance". : Blackwell Publishing,, 2001. Text.