Παραπομπή σε μορφή APA (7η εκδ.)

Cunningham, W. P. (2004). Principles of Environmental Science: Inquiry and Applicaions. McGraw-Hill Higher Education, Boston.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Cunningham, William P. Principles of Environmental Science: Inquiry and Applicaions. New York: McGraw-Hill Higher Education, Boston, 2004.

Παραπομπή σε μορφή MLA (9th εκδ.)

Cunningham, William P. Principles of Environmental Science: Inquiry and Applicaions. McGraw-Hill Higher Education, Boston, 2004.