Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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