APA (7th ed.) Citation

Olsen, R. E. (1978). Karl Marx. Twayne.

Chicago Style (17th ed.) Citation

Olsen, Richard E. Karl Marx. Boston: Twayne, 1978.

MLA (9th ed.) Citation

Olsen, Richard E. Karl Marx. Twayne, 1978.

Warning: These citations may not always be 100% accurate.