APA (7th ed.) Citation

Cunningham F. Gary & Williams, J. W. (2001). Williams obstetrics (21st ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Cunningham F. Gary and J. Whitridge Williams. Williams Obstetrics. 21st ed. New York: McGraw-Hill, 2001.

MLA (9th ed.) Citation

Cunningham F. Gary and J. Whitridge Williams. Williams Obstetrics. 21st ed. McGraw-Hill, 2001.