RIES AL. (1986). POSITIONING: THE BATTLE FOR YOUR MINDS. MCGRAW-HILL.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRIES AL. POSITIONING: THE BATTLE FOR YOUR MINDS. NEW YORK: MCGRAW-HILL, 1986.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRIES AL. POSITIONING: THE BATTLE FOR YOUR MINDS. MCGRAW-HILL, 1986.
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