APA-viite (7. p.)

Cunningham, W. P., & Cunningham, M. A. (2020). Principles of environmental science: Inquiry & applications (Ninth editon.). McGraw-Hill Education.

Chicago-viite (17. p.)

Cunningham, William P., ja Mary Ann Cunningham. Principles of Environmental Science: Inquiry & Applications. Ninth editon. New York, NY: McGraw-Hill Education, 2020.

MLA-viite (9. p.)

Cunningham, William P., ja Mary Ann Cunningham. Principles of Environmental Science: Inquiry & Applications. Ninth editon. McGraw-Hill Education, 2020.