APA

Department for Disarmament Affairs, . (1989). The United Nations Disarmament Yearbook. New York: DDA.

Chicago

Department for Disarmament Affairs, . 1989. The United Nations Disarmament Yearbook. New York: DDA.

Harvard

Department for Disarmament Affairs, . (1989). The United Nations Disarmament Yearbook. New York: DDA.

MLA

Department for Disarmament Affairs, . The United Nations Disarmament Yearbook. New York: DDA. 1989.