APA (7th ed.) Citation

Williams, W. (1997). Williams obstetrics (20th ed.). Appleton & Lange.

Chicago Style (17th ed.) Citation

Williams, Whitridge. Williams Obstetrics. 20th ed. Stamford,Connecticut: Appleton & Lange, 1997.

MLA (9th ed.) Citation

Williams, Whitridge. Williams Obstetrics. 20th ed. Appleton & Lange, 1997.

Warning: These citations may not always be 100% accurate.