APA引文

Cunningham, F. G. (2006). Obstetricia de Williams.

芝加哥风格引文

Cunningham, F. Gary. Obstetricia De Williams. 2006.

MLA引文

Cunningham, F. Gary. Obstetricia De Williams. 2006.

警告：这些引文格式不一定是100％准确.