APA (7th ed.) Citation

Marx, K., & Engels, F. Collected works. Progress Pubs.

Chicago Style (17th ed.) Citation

Marx, Karl, and F.;Marx Engels. Collected Works. Progress Pubs.

MLA (9th ed.) Citation

Marx, Karl, and F.;Marx Engels. Collected Works. Progress Pubs.

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