Cita APA (7a ed.)

Ayres, I. (2005). Optional law: The structure of legal entitlements. University of Chicago Press.

Cita Chicago Style (17a ed.)

Ayres, Ian. Optional Law: The Structure of Legal Entitlements. Chicago: University of Chicago Press, 2005.

Cita MLA (9a ed.)

Ayres, Ian. Optional Law: The Structure of Legal Entitlements. University of Chicago Press, 2005.