Penrose, R. (1989). The Emperor's New Mind. Oxford University Press.
Chicago-čujuhus (17. p.)Penrose, Roger. The Emperor's New Mind. New York: Oxford University Press, 1989.
MLA-čujuhus (9. p.)Penrose, Roger. The Emperor's New Mind. Oxford University Press, 1989.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.