Cita APA (7th ed.)
Fromm, E., & Xirau, R. The nature of man: Readings.
Cita Chicago (17th ed.)
Fromm, Erich, i Ramón Xirau. The Nature of Man: Readings.
Cita MLA (9th ed.)
Fromm, Erich, i Ramón Xirau. The Nature of Man: Readings.
Atenció: Aquestes cites poden no estar 100% correctes.