Duke, D. (1990). Teaching an introduction. Mc Graw Hill.
Chicago-čujuhus (17. p.)Duke, Daniel. Teaching an Introduction. New York: Mc Graw Hill, 1990.
MLA-čujuhus (9. p.)Duke, Daniel. Teaching an Introduction. Mc Graw Hill, 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.