Perry, R. B. (1954). Realms of value: A critique of human civilization. Harvard University Press.
Cita Chicago Style (17a ed.)Perry, Ralph Barton. Realms of Value: A Critique of Human Civilization. Cambridge (Massachusetts): Harvard University Press, 1954.
Cita MLA (9a ed.)Perry, Ralph Barton. Realms of Value: A Critique of Human Civilization. Harvard University Press, 1954.
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