APA

Catlin G. E. G., . (1939). The story of the political philosophers. New York: McGraw-Hill Book Company, Inc.

Chicago

Catlin George Edward Gordon, . 1939. The story of the political philosophers. New York: McGraw-Hill Book Company, Inc.

Harvard

Catlin G. E. G., . (1939). The story of the political philosophers. New York: McGraw-Hill Book Company, Inc.

MLA

Catlin George Edward Gordon, . The story of the political philosophers. New York: McGraw-Hill Book Company, Inc. 1939.