APA
UNITED NATIONS I. N. C. B., UNITED NATIONS I. N. C. B., . (1971). Estimated worl requirments of narcotic drugs in 1971. New York: UN.
Chicago
UNITED NATIONS INTERNATIONAL NARCOTICS CONTROL BOARD, UNITED NATIONS INTERNATIONAL NARCOTICS CONTROL BOARD, . 1971. Estimated worl requirments of narcotic drugs in 1971. New York: UN.
Harvard
UNITED NATIONS I. N. C. B., UNITED NATIONS I. N. C. B., . (1971). Estimated worl requirments of narcotic drugs in 1971. New York: UN.
MLA
UNITED NATIONS INTERNATIONAL NARCOTICS CONTROL BOARD, UNITED NATIONS INTERNATIONAL NARCOTICS CONTROL BOARD, . Estimated worl requirments of narcotic drugs in 1971. New York: UN. 1971.
