APA (7th ed.) Citation

United Nations & United Nations. (1990). The Blue helmets: A review of United Nations peace-keeping (2nd ed.). United Nations, Dept. of Public Information.

Chicago Style (17th ed.) Citation

United Nations and United Nations. The Blue Helmets: A Review of United Nations Peace-keeping. 2nd ed. [New York, N.Y.]: United Nations, Dept. of Public Information, 1990.

MLA (8th ed.) Citation

United Nations and United Nations. The Blue Helmets: A Review of United Nations Peace-keeping. 2nd ed. United Nations, Dept. of Public Information, 1990.