Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.