APA引文

Cunningham, W. P. (1997). Environmental science: A global concern (4th.ed.). Wm.C.Brown.

芝加哥风格引文

Cunningham, William P. Environmental Science: A Global Concern. 4th.ed. Dubuque: Wm.C.Brown, 1997.

MLA引文

Cunningham, William P. Environmental Science: A Global Concern. 4th.ed. Wm.C.Brown, 1997.

警告：这些引文格式不一定是100％准确.