APA Citation

Sinek, S. (2011). Start with why: How great leaders inspire everyone to take action. London [etc.]: Portfolio Penguin.

Chicago Style Citation

Sinek, Simon. Start With Why: How Great Leaders Inspire Everyone to Take Action. London [etc.]: Portfolio Penguin, 2011.

MLA Citation

Sinek, Simon. Start With Why: How Great Leaders Inspire Everyone to Take Action. London [etc.]: Portfolio Penguin, 2011.

Warning: These citations may not always be 100% accurate.