APA Style

Cunningham, F. Gary, Gant, Norman F., Leveno, Kenneth J., Gilstrap III, Larry C., Hauth, John C., Wenstrom, Katharine D. (2001). Williams Obstetrics 21st Edition . USA: McGraw-Hill.

Chicago Style

Cunningham, F. Gary, Gant, Norman F., Leveno, Kenneth J., Gilstrap III, Larry C., Hauth, John C., Wenstrom, Katharine D. Williams Obstetrics 21st Edition. USA: McGraw-Hill, 2001. Text.

MLA Style

Cunningham, F. Gary, Gant, Norman F., Leveno, Kenneth J., Gilstrap III, Larry C., Hauth, John C., Wenstrom, Katharine D. Williams Obstetrics 21st Edition. USA: McGraw-Hill, 2001. Text.

Turabian Style

Cunningham, F. Gary, Gant, Norman F., Leveno, Kenneth J., Gilstrap III, Larry C., Hauth, John C., Wenstrom, Katharine D. Williams Obstetrics 21st Edition. USA: McGraw-Hill, 2001. Print.