Cita APA (7a ed.)
Fromm, E., & Xirau, R. The nature of man: Readings.
Cita Chicago Style (17a ed.)
Fromm, Erich, y Ramón Xirau. The Nature of Man: Readings.
Cita MLA (9a ed.)
Fromm, Erich, y Ramón Xirau. The Nature of Man: Readings.
警告：這些引文格式不一定是100％准確.