Cita APA (7a ed.)

Ketchum, R. What is communism? E.P Dutton & Co. Inc.

Cita Chicago Style (17a ed.)

Ketchum, Richard. What Is Communism? New York: E.P Dutton & Co. Inc.

Cita MLA (9a ed.)

Ketchum, Richard. What Is Communism? E.P Dutton & Co. Inc.