FERBER ROBERT EDT. (1974). HANDBOOK OF MARKETING RESEARCH. MCGRAW-HILL.
Chicago-čujuhus (17. p.)FERBER ROBERT EDT. HANDBOOK OF MARKETING RESEARCH. NEW YORK: MCGRAW-HILL, 1974.
MLA-čujuhus (9. p.)FERBER ROBERT EDT. HANDBOOK OF MARKETING RESEARCH. MCGRAW-HILL, 1974.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.