Steel, J. (2007). Perfect pitch: The art of selling ideas and winning new business. John Wiley & Sons ; John Wiley [distributor].
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSteel, Jon. Perfect Pitch: The Art of Selling Ideas and Winning New Business. Hoboken, N.J. : Chichester: John Wiley & Sons ; John Wiley [distributor], 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSteel, Jon. Perfect Pitch: The Art of Selling Ideas and Winning New Business. John Wiley & Sons ; John Wiley [distributor], 2007.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.