United Nations Environment Programme. Environmental Education and Training Unit, United Nations Environment Programme, Atchia, M., & Tropp, S. (1995). Environmental management: Issues and solutions. Wiley.
Chicago-Zitierstil (17. Ausg.)United Nations Environment Programme. Environmental Education and Training Unit, United Nations Environment Programme, Michaèel Atchia, und Shawna Tropp. Environmental Management: Issues and Solutions. Chichester: Wiley, 1995.
MLA-Zitierstil (9. Ausg.)United Nations Environment Programme. Environmental Education and Training Unit, et al. Environmental Management: Issues and Solutions. Wiley, 1995.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.