UNEP. (1979). Directory of institutions and individuals active in environmentally sound and appropriate technologies. Pergamon press.
Chicago-стиль цитированияUNEP. Directory of Institutions and Individuals Active in Environmentally Sound and Appropriate Technologies. NewYork: Pergamon press, 1979.
MLA-цитированиеUNEP. Directory of Institutions and Individuals Active in Environmentally Sound and Appropriate Technologies. Pergamon press, 1979.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.