APA引文

Cunningham, W. P. (2007). Environmental science: A globl concern. Boston: McGraw-Hill Higher Education.

Trích dẫn kiểu Chicago

Cunningham, William P. Environmental Science: A Globl Concern. Boston: McGraw-Hill Higher Education, 2007.

MLA引文

Cunningham, William P. Environmental Science: A Globl Concern. Boston: McGraw-Hill Higher Education, 2007.

警告：這些引文格式不一定是100％准確.