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-viite (17. p.)United Nations Environment Programme. Environmental Education and Training Unit, United Nations Environment Programme, Michaèel Atchia, ja Shawna Tropp. Environmental Management: Issues and Solutions. Chichester: Wiley, 1995.
MLA-viite (9. p.)United Nations Environment Programme. Environmental Education and Training Unit, et al. Environmental Management: Issues and Solutions. Wiley, 1995.
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