APA

Whitaker A. P., . (1951). Development of american regionalism : the organization of American States. New York: Carnegie Endowment for International Peace.

Chicago

Whitaker Arthur Preston, . 1951. Development of american regionalism : the organization of American States. New York: Carnegie Endowment for International Peace.

Harvard

Whitaker A. P., . (1951). Development of american regionalism : the organization of American States. New York: Carnegie Endowment for International Peace.

MLA

Whitaker Arthur Preston, . Development of american regionalism : the organization of American States. New York: Carnegie Endowment for International Peace. 1951.