APA
Scherr S., . (1981). Preliminary guide to audiovisual materials on environmental and natural resouce issues in developing countries: a survey for the U.S. agency for international development/man and the biolsphere program. Washington-US: United States Agency for International Development.
Chicago
Scherr S.J, . 1981. Preliminary guide to audiovisual materials on environmental and natural resouce issues in developing countries: a survey for the U.S. agency for international development/man and the biolsphere program. Washington-US: United States Agency for International Development.
Harvard
Scherr S., . (1981). Preliminary guide to audiovisual materials on environmental and natural resouce issues in developing countries: a survey for the U.S. agency for international development/man and the biolsphere program. Washington-US: United States Agency for International Development.
MLA
Scherr S.J, . Preliminary guide to audiovisual materials on environmental and natural resouce issues in developing countries: a survey for the U.S. agency for international development/man and the biolsphere program. Washington-US: United States Agency for International Development. 1981.