APA (7th ed.) Citation

Cunningham, F. G., & Williams, J. W. (2010). Williams obstetrics (23rd ed.). McGraw-Hill Medical.

Chicago Style (17th ed.) Citation

Cunningham, F. Gary, and J. Whitridge Williams. Williams Obstetrics. 23rd ed. New York: McGraw-Hill Medical, 2010.

MLA (9th ed.) Citation

Cunningham, F. Gary, and J. Whitridge Williams. Williams Obstetrics. 23rd ed. McGraw-Hill Medical, 2010.