APA (7th ed.) Citation

Marx, K., & Engels, F. (1963). Letters to Americans, 1848-1895: A selection <from> K. Marx and F. Engels. International Pubs..

Chicago Style (17th ed.) Citation

Marx, Karl, and Friedrich Engels. Letters to Americans, 1848-1895: A Selection <from> K. Marx and F. Engels. New York: International Pubs., 1963.

MLA (8th ed.) Citation

Marx, Karl, and Friedrich Engels. Letters to Americans, 1848-1895: A Selection <from> K. Marx and F. Engels. International Pubs., 1963.