APA (7th ed.) Citation

Engels, F., & Untermann, E. (2010). The Origin of the Family, Private Property and the State. Project Gutenberg.

Chicago Style (17th ed.) Citation

Engels, Friedrich, and Ernest Untermann. The Origin of the Family, Private Property and the State. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Engels, Friedrich, and Ernest Untermann. The Origin of the Family, Private Property and the State. Project Gutenberg, 2010.

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