Hungerford, H. R. (1980). Strategies for developing an environmental education curriculum: A discussion guide for Unesco training workshops on environmental education. Unesco, Regional Office for Education in Asia and Oceania.
Čikaški stil citiranja (17. izdanje)Hungerford, Harold R. Strategies for Developing an Environmental Education Curriculum: A Discussion Guide for Unesco Training Workshops on Environmental Education. Bangkok: Unesco, Regional Office for Education in Asia and Oceania, 1980.
MLA način citiranja (9. izdanje)Hungerford, Harold R. Strategies for Developing an Environmental Education Curriculum: A Discussion Guide for Unesco Training Workshops on Environmental Education. Unesco, Regional Office for Education in Asia and Oceania, 1980.
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