APA引文

Cunningham, F. G. (2011). Williams Obstetricia <i>es</i>.

芝加哥风格引文

Cunningham, F. Gary. Williams Obstetricia <i>es</i>. 2011.

MLA引文

Cunningham, F. Gary. Williams Obstetricia <i>es</i>. 2011.

警告：这些引文格式不一定是100％准确.