APA (7th ed.) Citation

Marx, K., & Engels, F. (1957). On religion / by K. Marx and F. Engels. Progress Publishers.

Chicago Style (17th ed.) Citation

Marx, Karl, and Friedrich Engels. On Religion / by K. Marx and F. Engels. Progress Publishers, 1957.

MLA (9th ed.) Citation

Marx, Karl, and Friedrich Engels. On Religion / by K. Marx and F. Engels. Progress Publishers, 1957.

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