APA (7th ed.) Citation

Marx, K., Engels, F., & Raddatz, F. J. (1981). Selected letters: The personal correspondence, 1844-1877 (1st American ed.). Little, Brown.

Chicago Style (17th ed.) Citation

Marx, Karl, Friedrich Engels, and Fritz J. Raddatz. Selected Letters: The Personal Correspondence, 1844-1877. 1st American ed. Boston: Little, Brown, 1981.

MLA (9th ed.) Citation

Marx, Karl, et al. Selected Letters: The Personal Correspondence, 1844-1877. 1st American ed. Little, Brown, 1981.