Cita APA (7a ed.)

HUTCHINS, R. M. [. (1989). Great books of the western world vol.50: Marx Engels. Encyclopaedia Britannica.

Cita Chicago Style (17a ed.)

HUTCHINS, Robert Maynard [Ed.]. Great Books of the Western World Vol.50: Marx Engels. Chicago: Encyclopaedia Britannica, 1989.

Cita MLA (9a ed.)

HUTCHINS, Robert Maynard [Ed.]. Great Books of the Western World Vol.50: Marx Engels. Encyclopaedia Britannica, 1989.