BLY ROBERT W. (1992). BUSINESS TO BUSINESS DIRECT MARKETING. NTC BUSINESS BOOKS.
Chicago-čujuhus (17. p.)BLY ROBERT W. BUSINESS TO BUSINESS DIRECT MARKETING. LINCOLNWOOD: NTC BUSINESS BOOKS, 1992.
MLA-čujuhus (9. p.)BLY ROBERT W. BUSINESS TO BUSINESS DIRECT MARKETING. NTC BUSINESS BOOKS, 1992.
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