APA引文

Cunningham, W. P. (2005). Environmental science: A global concern. Boston: McGraw-Hill Higher Education.

Trích dẫn kiểu Chicago

Cunningham, William P. Environmental Science: A Global Concern. Boston: McGraw-Hill Higher Education, 2005.

MLA引文

Cunningham, William P. Environmental Science: A Global Concern. Boston: McGraw-Hill Higher Education, 2005.

警告：这些引文格式不一定是100％准确.