KATZENSTEIN HERBERT. (1992). DIRECT MARKETING (2.). MAXWELL MACMILLAN PUBLICATION LTD.
Chicago-čujuhus (17. p.)KATZENSTEIN HERBERT. DIRECT MARKETING. 2. NEW YORK: MAXWELL MACMILLAN PUBLICATION LTD, 1992.
MLA-čujuhus (9. p.)KATZENSTEIN HERBERT. DIRECT MARKETING. 2. MAXWELL MACMILLAN PUBLICATION LTD, 1992.
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