Cita APA (7th ed.)
Fromm, E., Marx, K., & Bottomore, T. B. Marx's Concept of Man. Frederick Ungar.
Cita Chicago (17th ed.)
Fromm, Erich, Karl Marx, i Thomas B. Bottomore. Marx's Concept of Man. Nueva York, EUA: Frederick Ungar.
Cita MLA (9th ed.)
Fromm, Erich, et al. Marx's Concept of Man. Frederick Ungar.
Atenció: Aquestes cites poden no estar 100% correctes.