APA引文

Cunningham F. Gary & Williams, J. W. (2005). Williams obstetrics (22nd ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Cunningham F. Gary and J. Whitridge Williams. Williams Obstetrics. 22nd ed. New York: McGraw-Hill, 2005.

MLA引文

Cunningham F. Gary and J. Whitridge Williams. Williams Obstetrics. 22nd ed. McGraw-Hill, 2005.