Beri G C. (2013). Marketing Research (5th.). McGraw Hill.
Chicago-čujuhus (17. p.)Beri G C. Marketing Research. 5th. New Delhi: McGraw Hill, 2013.
MLA-čujuhus (9. p.)Beri G C. Marketing Research. 5th. McGraw Hill, 2013.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.