Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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