APA引文

Cunningham, W. P. (2005). Environmental science: A global concern. McGraw-Hill higher education.

Trích dẫn kiểu Chicago

Cunningham, William P. Environmental Science: A Global Concern. McGraw-Hill higher education, 2005.

MLA引文

Cunningham, William P. Environmental Science: A Global Concern. McGraw-Hill higher education, 2005.

警告：這些引文格式不一定是100％准確.