APA استشهاد

Coyle,David Cushman. (1966). United Nations and how it works. Columbia University.

استشهاد بنمط شيكاغو

Coyle,David Cushman. United Nations and How It Works. New York: Columbia University, 1966.

MLA استشهاد

Coyle,David Cushman. United Nations and How It Works. Columbia University, 1966.