Lepley, R. (1957). The language of value. Columbia University Press.
Cita Chicago (17th ed.)Lepley, Ray. The Language of Value. New York: Columbia University Press, 1957.
Cita MLA (9th ed.)Lepley, Ray. The Language of Value. Columbia University Press, 1957.
Atenció: Aquestes cites poden no estar 100% correctes.