APA (7th ed.) Citation

Marx, K., & Padover, S. K. (1979). The letters of Karl Marx.

Chicago Style (17th ed.) Citation

Marx, Karl, and Saul K. Padover. The Letters of Karl Marx. 1979.

MLA (8th ed.) Citation

Marx, Karl, and Saul K. Padover. The Letters of Karl Marx. 1979.

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