Ayres, I. (2005). Optional law: The structure of legal entitlements. University of Chicago Press.
Tohutoru Kātū Chicago (17th ed.)Ayres, Ian. Optional Law: The Structure of Legal Entitlements. Chicago: University of Chicago Press, 2005.
Tohutoro MLA (9th ed.)Ayres, Ian. Optional Law: The Structure of Legal Entitlements. University of Chicago Press, 2005.
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