Schafer, J., & Karlins, M. (2015). The like switch: An ex-FBI agent's guide to influencing, attracting, and winning people over. Simon & Schuster.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSchafer, Jack., और Marvin Karlins. The like Switch: An Ex-FBI Agent's Guide to Influencing, Attracting, and Winning People over. New York: Simon & Schuster, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSchafer, Jack., और Marvin Karlins. The like Switch: An Ex-FBI Agent's Guide to Influencing, Attracting, and Winning People over. Simon & Schuster, 2015.
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