Παραπομπή σε μορφή APA (7η εκδ.)

Environmental Careers Organization & ebrary, Inc. (2004). The ECO guide to careers that make a difference. Island Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Environmental Careers Organization και Inc ebrary. The ECO Guide to Careers That Make a Difference. Washington: Island Press, 2004.

Παραπομπή σε μορφή MLA (9th εκδ.)

Environmental Careers Organization και Inc ebrary. The ECO Guide to Careers That Make a Difference. Island Press, 2004.