Cita APA (7a ed.)

Barker, R. (1990). Political legitimacy and the state. Clarendon [etc.].

Cita Chicago Style (17a ed.)

Barker, Rodney. Political Legitimacy and the State. Oxford [etc.]: Clarendon [etc.], 1990.

Cita MLA (9a ed.)

Barker, Rodney. Political Legitimacy and the State. Clarendon [etc.], 1990.