Richard Denny. (1990). Selling to win: Tested techniques for closing the sale. Universal book stall.
Chicago-stil citatRichard Denny. Selling to Win: Tested Techniques for Closing the Sale. New Delhi: Universal book stall, 1990.
MLA-referensRichard Denny. Selling to Win: Tested Techniques for Closing the Sale. Universal book stall, 1990.
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