APA

Advisory Committee for the co-ordination systems, . (1992). Books in Print of the United Nations System. New York: United Nations.

Chicago

Advisory Committee for the co-ordination systems, . 1992. Books in Print of the United Nations System. New York: United Nations.

Harvard

Advisory Committee for the co-ordination systems, . (1992). Books in Print of the United Nations System. New York: United Nations.

MLA

Advisory Committee for the co-ordination systems, . Books in Print of the United Nations System. New York: United Nations. 1992.