APA (7th ed.) Citation

Gallis, P. E. (1997). NATO: Article V and collective defense. Congressional Research Service, Library of Congress.

Chicago Style (17th ed.) Citation

Gallis, Paul E. NATO: Article V and Collective Defense. [Washington, D.C.]: Congressional Research Service, Library of Congress, 1997.

MLA (9th ed.) Citation

Gallis, Paul E. NATO: Article V and Collective Defense. Congressional Research Service, Library of Congress, 1997.