APA (7th ed.) Citation

Marx, K., Engels, F., & Rumyantseva, N. (1979). Marx and Engels on the United States.

Chicago Style (17th ed.) Citation

Marx, Karl, Friedrich Engels, and Nelly Rumyantseva. Marx and Engels on the United States. 1979.

MLA (8th ed.) Citation

Marx, Karl, et al. Marx and Engels on the United States. 1979.