APA (7th ed.) Citation

Marx, K., Engels, F., Raddatz, F. J., & Osers, E. (1981). The Marx-Engels correspondence: The personal letters, 1844-1877. London: Weidenfeld and Nicolson.

Chicago Style (17th ed.) Citation

Marx, Karl, Friedrich Engels, Fritz J. Raddatz, and Ewald Osers. The Marx-Engels Correspondence: The Personal Letters, 1844-1877. London: Weidenfeld and Nicolson, 1981.

MLA (8th ed.) Citation

Marx, Karl, et al. The Marx-Engels Correspondence: The Personal Letters, 1844-1877. London: Weidenfeld and Nicolson, 1981.