Παραπομπή σε μορφή APA (7η εκδ.)

Freedman, B. (1989). Environmental ecology: The impacts of pollution and other stresses on ecosystem structure and function.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Freedman, Bill. Environmental Ecology: The Impacts of Pollution and Other Stresses on Ecosystem Structure and Function. San Diego, 1989.

Παραπομπή σε μορφή MLA (8th εκδ.)

Freedman, Bill. Environmental Ecology: The Impacts of Pollution and Other Stresses on Ecosystem Structure and Function. 1989.