Crystal, D. (2002). Language death (Canto ed.). Cambridge University Press.
Chicago-čujuhus (17. p.)Crystal, David. Language Death. Canto ed. Cambridge, UK ; New York, NY: Cambridge University Press, 2002.
MLA-čujuhus (9. p.)Crystal, David. Language Death. Canto ed. Cambridge University Press, 2002.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.