(2000). Tutorial National Guideline Clearinghouse. [electronic resource].
Chicago-čujuhus (17. p.)Tutorial National Guideline Clearinghouse. [electronic Resource]. 2000.
MLA-čujuhus (9. p.)Tutorial National Guideline Clearinghouse. [electronic Resource]. 2000.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.