APA
UNITED NATIONS P. C. O. B., UNITED NATIONS P. C. O. B., . (1957). Report to the economic and social council on the work of the board in 1957. Geneva: UN.
Chicago
UNITED NATIONS PERMANENT CENTRAL OPIUM BOARD, UNITED NATIONS PERMANENT CENTRAL OPIUM BOARD, . 1957. Report to the economic and social council on the work of the board in 1957. Geneva: UN.
Harvard
UNITED NATIONS P. C. O. B., UNITED NATIONS P. C. O. B., . (1957). Report to the economic and social council on the work of the board in 1957. Geneva: UN.
MLA
UNITED NATIONS PERMANENT CENTRAL OPIUM BOARD, UNITED NATIONS PERMANENT CENTRAL OPIUM BOARD, . Report to the economic and social council on the work of the board in 1957. Geneva: UN. 1957.
