McCombs, D. (2000). Ultima thule. Yale University Press.
Chicago-čujuhus (17. p.)McCombs, Davis. Ultima Thule. New Haven: Yale University Press, 2000.
MLA-čujuhus (9. p.)McCombs, Davis. Ultima Thule. Yale University Press, 2000.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.