APA

Gabriel R. H., . (1940). The course of American democratic thought. New York: Ronald Press Co.

Chicago

Gabriel Ralph Henry, . 1940. The course of American democratic thought. New York: Ronald Press Co.

Harvard

Gabriel R. H., . (1940). The course of American democratic thought. New York: Ronald Press Co.

MLA

Gabriel Ralph Henry, . The course of American democratic thought. New York: Ronald Press Co. 1940.