Environmental Careers Organization & ebrary, Inc. (2004). The ECO guide to careers that make a difference. Island Press.
Chicago-Zitierstil (17. Ausg.)Environmental Careers Organization und Inc ebrary. The ECO Guide to Careers That Make a Difference. Washington: Island Press, 2004.
MLA-Zitierstil (9. Ausg.)Environmental Careers Organization und Inc ebrary. The ECO Guide to Careers That Make a Difference. Island Press, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.