APA (7th ed.) Citation

Marx, K., & Engels, F. (1968). Karl Marx and Frederick Engels: Selected works in one volume. International Publishers.

Chicago Style (17th ed.) Citation

Marx, Karl, and Friedrich Engels. Karl Marx and Frederick Engels: Selected Works in One Volume. New York: International Publishers, 1968.

MLA (9th ed.) Citation

Marx, Karl, and Friedrich Engels. Karl Marx and Frederick Engels: Selected Works in One Volume. International Publishers, 1968.