APA引文

Cunningham, F. G. (2006). Obstetricia de Williams (22 ed.). McGraw - Hill.

Chicago Style (17th ed.) Citation

Cunningham, F. Gary. Obstetricia De Williams. 22 ed. México, D.F: McGraw - Hill, 2006.

MLA引文

Cunningham, F. Gary. Obstetricia De Williams. 22 ed. McGraw - Hill, 2006.

警告：這些引文格式不一定是100％准確.