APA (7th ed.) Citation

Beer, M., Partington, T. C., & Stenning, H. J. (2011). The life and teaching of Karl Marx. Project Gutenberg.

Chicago Style (17th ed.) Citation

Beer, Max, T. C. Partington, and H. J. Stenning. The Life and Teaching of Karl Marx. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Beer, Max, et al. The Life and Teaching of Karl Marx. Project Gutenberg, 2011.

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