Hoffner, J. (1962). Problemas éticos de la época industrial. Rialp.
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Tohutoru Kātū Chicago (17th ed.)
Hoffner, Joseph. Problemas Éticos De La Época Industrial. Madrid: Rialp, 1962.
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Tohutoro MLA (9th ed.)
Hoffner, Joseph. Problemas Éticos De La Época Industrial. Rialp, 1962.
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