Ryan, A. (1974). J.S. Mill. Routledge and Kegan Paul.
Cita Chicago (17th ed.)Ryan, Alan. J.S. Mill. London: Routledge and Kegan Paul, 1974.
Cita MLA (9th ed.)Ryan, Alan. J.S. Mill. Routledge and Kegan Paul, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.