APA (7th ed.) Citation

Marx, K., & Engels, F. (1974). On Religion =: Sobre la religión. Schocken Books.

Chicago Style (17th ed.) Citation

Marx, Karl, and Friedrich Engels. On Religion =: Sobre La Religión. New York: Schocken Books, 1974.

MLA (9th ed.) Citation

Marx, Karl, and Friedrich Engels. On Religion =: Sobre La Religión. Schocken Books, 1974.

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