Cita APA

Williams, P. P., & Julián, T. M. (1986). Obstetrics and gynecology: Speciality board review.

Citación estilo Chicago

Williams, Preston P., y Thomas M. Julián. Obstetrics and Gynecology: Speciality Board Review. 1986.

Cita MLA

Williams, Preston P., y Thomas M. Julián. Obstetrics and Gynecology: Speciality Board Review. 1986.