Marx, K., Engels, F., Badia, G., & Mortier, J. Correspondance. Paris: Editions Sociales.
Lua i Stíl Chicago (17ú heag.)Marx, Karl, Friedrich Engels, Gilbert Badia, agus Jean Mortier. Correspondance. Paris: Editions Sociales.
Lua MLA (8ú heag.)Marx, Karl, et al. Correspondance. Paris: Editions Sociales.
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