Raman Singh. Business Communication 2nd Ed. Oxford.
Chicago-čujuhus (17. p.)Raman Singh. Business Communication 2nd Ed. Oxford.
MLA-čujuhus (9. p.)Raman Singh. Business Communication 2nd Ed. Oxford.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.