APA
UNITED NATIONS P. C. O. B., UNITED NATIONS P. C. O. B., . (1956). Report to the economic and social council on the work of the board in 1956. Geneva: UN.
Chicago
UNITED NATIONS PERMANENT CENTRAL OPIUM BOARD, UNITED NATIONS PERMANENT CENTRAL OPIUM BOARD, . 1956. Report to the economic and social council on the work of the board in 1956. Geneva: UN.
Harvard
UNITED NATIONS P. C. O. B., UNITED NATIONS P. C. O. B., . (1956). Report to the economic and social council on the work of the board in 1956. 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 1956. Geneva: UN. 1956.
