Cita APA (7a ed.)

Richards, D. A. J. (1971). A theory of reasons for action. Clarendon.

Cita Chicago Style (17a ed.)

Richards, David A. J. A Theory of Reasons for Action. Oxford: Clarendon, 1971.

Cita MLA (9a ed.)

Richards, David A. J. A Theory of Reasons for Action. Clarendon, 1971.