APA (7th ed.) Citation

Engels, F., Lafargue, L., Lafargue, P., Bottigelli, E., & Meier, P. 1891-1895. Editions sociales (Paris).

Chicago Style (17th ed.) Citation

Engels, Friedrich, Laura Lafargue, Paul Lafargue, Emile Bottigelli, and Paul Meier. 1891-1895. Editions sociales (Paris).

MLA (8th ed.) Citation

Engels, Friedrich, et al. 1891-1895. Editions sociales (Paris).