Gaya APA

), F., A., (., E., -., A. (1991). The Principles and Practice of Ultrasonography in Obstetrics and Gynecology (Fourth Edition). Norwalk, California: Appleton & Lange.

Gaya MLA

), F., A., (., E., -., A.. The Principles and Practice of Ultrasonography in Obstetrics and Gynecology. Fourth Edition Norwalk, California: Appleton & Lange, 1991. Text.