Gaya APA

Hadwck, P, A, A, F, P. (1985). Ultrasound in obstetrics and gynecology. -- 2nd ed. . St. Louis: The C. V. Mosby Co..

Gaya MLA

Hadwck, Patricia, Ann, Athery,, Frank, P.. "Ultrasound in obstetrics and gynecology. -- 2nd ed.". St. Louis: The C. V. Mosby Co., 1985. Text.