Muller, H. J. (1961). Freedom in the ancient world. Harper.
Cita Chicago (17th ed.)Muller, Herbert Joseph. Freedom in the Ancient World. New York: Harper, 1961.
Cita MLA (9th ed.)Muller, Herbert Joseph. Freedom in the Ancient World. Harper, 1961.
Atenció: Aquestes cites poden no estar 100% correctes.