APA (7th ed.) Citation

Engels, F., & Lewis, A. (2010). Landmarks of Scientific Socialism: "Anti-Duehring". Project Gutenberg.

Chicago Style (17th ed.) Citation

Engels, Friedrich, and Austin Lewis. Landmarks of Scientific Socialism: "Anti-Duehring". Project Gutenberg, 2010.

MLA (9th ed.) Citation

Engels, Friedrich, and Austin Lewis. Landmarks of Scientific Socialism: "Anti-Duehring". Project Gutenberg, 2010.

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