Educational Testing Service. ETS research report series. Educational Testing Service.
Chicago-čujuhus (17. p.)Educational Testing Service. ETS Research Report Series. Princeton, N.J.: Educational Testing Service.
MLA-čujuhus (9. p.)Educational Testing Service. ETS Research Report Series. Educational Testing Service.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.