Denny, R. (2001). Selling to win: Tested techniques for closing the sale (Rev. 2nd edition.). Kogan Page.
Chicago-viite (17. p.)Denny, Richard. Selling to Win: Tested Techniques for Closing the Sale. Rev. 2nd edition. London: Kogan Page, 2001.
MLA-viite (8. p.)Denny, Richard. Selling to Win: Tested Techniques for Closing the Sale. Rev. 2nd edition. Kogan Page, 2001.
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