APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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