Norris, J. M. (2008). Validity evaluation in language assessment. Peter Lang.
Chicago-čujuhus (17. p.)Norris, John Michael. Validity Evaluation in Language Assessment. Frankfurt am Main ; New York: Peter Lang, 2008.
MLA-čujuhus (9. p.)Norris, John Michael. Validity Evaluation in Language Assessment. Peter Lang, 2008.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.