Cita APA (7a ed.)

Lucas, J. R. (1967). The principles of politics. Clarendon.

Cita Chicago Style (17a ed.)

Lucas, J. R. The Principles of Politics. Oxford: Clarendon, 1967.

Cita MLA (9a ed.)

Lucas, J. R. The Principles of Politics. Clarendon, 1967.