APA (7th ed.) Citation

Callen, P. W. (2008). Ultrasonography in obstetrics and gynecology (5th ed.). Saunders Elsevier.

Chicago Style (17th ed.) Citation

Callen, Peter W. Ultrasonography in Obstetrics and Gynecology. 5th ed. Philadelphia, PA: Saunders Elsevier, 2008.

MLA (9th ed.) Citation

Callen, Peter W. Ultrasonography in Obstetrics and Gynecology. 5th ed. Saunders Elsevier, 2008.

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