Carnegie & Associates, D., & Petkoff, R. (2011). How to win friends and influence people in the digital age (Unabridged.). Simon & Schuster Audio.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCarnegie & Associates, Dale, और Robert Petkoff. How to Win Friends and Influence People in the Digital Age. Unabridged. New York: Simon & Schuster Audio, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCarnegie & Associates, Dale, और Robert Petkoff. How to Win Friends and Influence People in the Digital Age. Unabridged. Simon & Schuster Audio, 2011.
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