APA (7th ed.) Citation

Marx, K., Engels, F., Badia, G., & Mortier, J. Correspondance. Paris: Editions Sociales.

Chicago Style (17th ed.) Citation

Marx, Karl, Friedrich Engels, Gilbert Badia, and Jean Mortier. Correspondance. Paris: Editions Sociales.

MLA (8th ed.) Citation

Marx, Karl, et al. Correspondance. Paris: Editions Sociales.