APA
UNITED NATIONS C. F. S. A. T. F. D., UNITED NATIONS C. F. S. A. T. F. D., . (1991). Energy systems environment and developmnet. New York: United Nations USA.
Chicago
UNITED NATIONS CENTRE FOR SCIENCE AND TECHNOLOGY FOR DEVELOPMENT, UNITED NATIONS CENTRE FOR SCIENCE AND TECHNOLOGY FOR DEVELOPMENT, . 1991. Energy systems environment and developmnet. New York: United Nations USA.
Harvard
UNITED NATIONS C. F. S. A. T. F. D., UNITED NATIONS C. F. S. A. T. F. D., . (1991). Energy systems environment and developmnet. New York: United Nations USA.
MLA
UNITED NATIONS CENTRE FOR SCIENCE AND TECHNOLOGY FOR DEVELOPMENT, UNITED NATIONS CENTRE FOR SCIENCE AND TECHNOLOGY FOR DEVELOPMENT, . Energy systems environment and developmnet. New York: United Nations USA. 1991.