APA (7th ed.) Citation

Elsevier Science (Firm), Norton, M. E., Scoutt, L. M., & Feldstein, V. A. (2017). Callen's ultrasonography in obstetrics and gynecology (Sixth edition.). Elsevier.

Chicago Style (17th ed.) Citation

Elsevier Science (Firm), Mary E. Norton, Leslie M. Scoutt, and Vickie A. Feldstein. Callen's Ultrasonography in Obstetrics and Gynecology. Sixth edition. Philadelphia, PA: Elsevier, 2017.

MLA (9th ed.) Citation

Elsevier Science (Firm), et al. Callen's Ultrasonography in Obstetrics and Gynecology. Sixth edition. Elsevier, 2017.