APA (7th ed.) Citation

MacDonald, R., Remarque, E. M., & Lefevre, L. R. Socialismo.

Chicago Style (17th ed.) Citation

MacDonald, Ramsay, Erich María Remarque, and Louis Raymond Lefevre. Socialismo.

MLA (9th ed.) Citation

MacDonald, Ramsay, et al. Socialismo.

Warning: These citations may not always be 100% accurate.