APA (7th ed.) Citation

Spargo, J. (2007). The Marx He Knew. Project Gutenberg.

Chicago Style (17th ed.) Citation

Spargo, John. The Marx He Knew. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Spargo, John. The Marx He Knew. Project Gutenberg, 2007.

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