Sinek, S. (2009). Start with why: How great leaders inspire everyone to take action. Portfolio.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSinek, Simon. Start with Why: How Great Leaders Inspire Everyone to Take Action. New York: Portfolio, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSinek, Simon. Start with Why: How Great Leaders Inspire Everyone to Take Action. Portfolio, 2009.
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