Cita APA

Callen, P. W. (1988). Ultrasonography in obstetrics and Gynecology.

Citación estilo Chicago

Callen, Peter W. Ultrasonography in Obstetrics and Gynecology. 1988.

Cita MLA

Callen, Peter W. Ultrasonography in Obstetrics and Gynecology. 1988.

Warning: These citations may not always be 100% accurate.