Cita APA (7a ed.)

Hook, S. (1933). Towards the understanding of Karl Marx. The John Day Company.

Cita Chicago Style (17a ed.)

Hook, Sidney. Towards the Understanding of Karl Marx. Nueva York: The John Day Company, 1933.

Cita MLA (8a ed.)

Hook, Sidney. Towards the Understanding of Karl Marx. The John Day Company, 1933.