APA引文

Keller, D. R. (2010). Environmental ethics: The big questions. Wiley-Blackwell.

Chicago Edition Citation

Keller, David R. Environmental Ethics: The Big Questions. U.S.A.: Wiley-Blackwell, 2010.

MLA引文

Keller, David R. Environmental Ethics: The Big Questions. Wiley-Blackwell, 2010.

警告：这些引文格式不一定是100％准确.