RYAN WILLIAMS T. (1976). PRINCIPLES OF MARKETING. RICHARD D.IRWIN INC.
Chicago-čujuhus (17. p.)RYAN WILLIAMS T. PRINCIPLES OF MARKETING. ILLIONIS: RICHARD D.IRWIN INC, 1976.
MLA-čujuhus (9. p.)RYAN WILLIAMS T. PRINCIPLES OF MARKETING. RICHARD D.IRWIN INC, 1976.
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