Condition of Education, 1999: Overview. US Department of Education.
Chicago-čujuhus (17. p.)Condition of Education, 1999: Overview. US Department of Education.
MLA-čujuhus (9. p.)Condition of Education, 1999: Overview. US Department of Education.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.