Price, R. (1997). Napoleon Hill and the Second Empire. Routledge.
Cita Chicago Style (17a ed.)Price, Roger. Napoleon Hill and the Second Empire. London: Routledge, 1997.
Cita MLA (9a ed.)Price, Roger. Napoleon Hill and the Second Empire. Routledge, 1997.
Precaución: Estas citas no son 100% exactas.