Cita APA (7th ed.)

Catlin, G. E. G. (1939). The story of the political philosophers. Tudor.

Cita Chicago (17th ed.)

Catlin, George Edward Gordon. The Story of the Political Philosophers. New York: Tudor, 1939.

Cita MLA (9th ed.)

Catlin, George Edward Gordon. The Story of the Political Philosophers. Tudor, 1939.