APA (7th ed.) Citation

Lenin, V. I., & Duncker, H. (1931). Karl Marx.

Chicago Style (17th ed.) Citation

Lenin, Vladimir I., and Hermann Duncker. Karl Marx. 1931.

MLA (8th ed.) Citation

Lenin, Vladimir I., and Hermann Duncker. Karl Marx. 1931.

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