APA引文

Cunninggham, W. P. (1999). Environmental science. WCB/McGraw-Hill.

Trích dẫn kiểu Chicago

Cunninggham, William P. Environmental Science. WCB/McGraw-Hill, 1999.

MLA引文

Cunninggham, William P. Environmental Science. WCB/McGraw-Hill, 1999.

警告：这些引文格式不一定是100％准确.