Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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