Zimmerman, M. J. (1996). The concept of moral obligation. Univ. Pr.
Tohutoru Kātū Chicago (17th ed.)Zimmerman, Michael J. The Concept of Moral Obligation. Cambridge: Univ. Pr, 1996.
Tohutoro MLA (9th ed.)Zimmerman, Michael J. The Concept of Moral Obligation. Univ. Pr, 1996.
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