Kumar, V. (2015). Marketing Research. SAGE.
Chicago-čujuhus (17. p.)Kumar, V. Marketing Research. SAGE, 2015.
MLA-čujuhus (9. p.)Kumar, V. Marketing Research. SAGE, 2015.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.