Burkman, r. t. (2000). Obstetric and gynecology clinic of north america. WB Sauders Company.
Cita Chicago (17th ed.)Burkman, ronald t. Obstetric and Gynecology Clinic of North America. WB Sauders Company, 2000.
Cita MLA (9th ed.)Burkman, ronald t. Obstetric and Gynecology Clinic of North America. WB Sauders Company, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.