Sundaram. International Buisness Environments. Pearson.
Chicago-čujuhus (17. p.)Sundaram. International Buisness Environments. Pearson.
MLA-čujuhus (9. p.)Sundaram. International Buisness Environments. Pearson.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.