APA aipamena

Seeds, J. W., & Cefalo, R. C. (1986). Practical obstetrical ultrasound. Aspen Pub.

Chicago Style aipamena

Seeds, John W., and Robert C. Cefalo. Practical Obstetrical Ultrasound. Rockville, MD: Aspen Pub, 1986.

MLA aipamena

Seeds, John W., and Robert C. Cefalo. Practical Obstetrical Ultrasound. Aspen Pub, 1986.