APA (7th ed.) Citation

Gregg, R. W., & Barkun, M. (1968). The United Nations system and its functions: Selected readings. Van Nostrand.

Chicago Style (17th ed.) Citation

Gregg, Robert W., and Michael Barkun. The United Nations System and Its Functions: Selected Readings. Princeton, N.J.: Van Nostrand, 1968.

MLA (9th ed.) Citation

Gregg, Robert W., and Michael Barkun. The United Nations System and Its Functions: Selected Readings. Van Nostrand, 1968.