Cita APA (7a ed.)

Pitkin, R. M., & Zlatnik, F. J. (1981). The year book of obstetrics and gynecology. Year Book Medical.

Cita Chicago Style (17a ed.)

Pitkin, Roy M., y Frank J. Zlatnik. The Year Book of Obstetrics and Gynecology. Year Book Medical, 1981.

Cita MLA (9a ed.)

Pitkin, Roy M., y Frank J. Zlatnik. The Year Book of Obstetrics and Gynecology. Year Book Medical, 1981.