APA ציטוט

UNEP. (1979). Directory of institutions and individuals active in environmentally sound and appropriate technologies. Pergamon press.

Chicago Edition Citation

UNEP. Directory of Institutions and Individuals Active in Environmentally Sound and Appropriate Technologies. NewYork: Pergamon press, 1979.

ציטוט MLA

UNEP. Directory of Institutions and Individuals Active in Environmentally Sound and Appropriate Technologies. Pergamon press, 1979.