RIES AL. (2003). POSITIONING: THE BATTLE FOR YOUR MIND (20TH.). TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED.
Chicago-viite (17. p.)RIES AL. POSITIONING: THE BATTLE FOR YOUR MIND. 20TH. NEW DELHI: TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2003.
MLA-viite (9. p.)RIES AL. POSITIONING: THE BATTLE FOR YOUR MIND. 20TH. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2003.
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