WILLSMER RAY. (1984). BASIC ART OF MARKETING (2ND.). BUSINESS PUBLICATION.
Chicago-čujuhus (17. p.)WILLSMER RAY. BASIC ART OF MARKETING. 2ND. LONDON: BUSINESS PUBLICATION, 1984.
MLA-čujuhus (9. p.)WILLSMER RAY. BASIC ART OF MARKETING. 2ND. BUSINESS PUBLICATION, 1984.
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