Price, R. (1997). Napoleon Hill and the Second Empire. Routledge.
Chicago-čujuhus (17. p.)Price, Roger. Napoleon Hill and the Second Empire. London: Routledge, 1997.
MLA-čujuhus (9. p.)Price, Roger. Napoleon Hill and the Second Empire. Routledge, 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.