APA (7th ed.) Citation

Marx, K., Engels, F., & Mortier, J. (1971). Correspondance . T. 1 (1835-1848).

Chicago Style (17th ed.) Citation

Marx, Karl, Friedrich Engels, and Jean Mortier. Correspondance . T. 1 (1835-1848). 1971.

MLA (8th ed.) Citation

Marx, Karl, et al. Correspondance . T. 1 (1835-1848). 1971.