Callen, P. W. (1988). Ultrasonography in obstetrics and Gynecology.
Cita Chicago Style (17a ed.)Callen, Peter W. Ultrasonography in Obstetrics and Gynecology. 1988.
Cita MLA (9a ed.)Callen, Peter W. Ultrasonography in Obstetrics and Gynecology. 1988.
Precaución: Estas citas no son 100% exactas.