Ries, A. (2001). Positioning (5th.). Wiley India Pvt. Ltd.
Chicago-čujuhus (17. p.)Ries, Al. Positioning. 5th. New Delhi: Wiley India Pvt. Ltd, 2001.
MLA-čujuhus (9. p.)Ries, Al. Positioning. 5th. Wiley India Pvt. Ltd, 2001.
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