APA (7th ed.) Citation

Sinek, S. (2014). Leaders eat last: Why some teams pull together and others don't. Portfolio/Penguin.

Chicago Style (17th ed.) Citation

Sinek, Simon. Leaders Eat Last: Why Some Teams Pull Together and Others Don't. London: Portfolio/Penguin, 2014.

MLA (9th ed.) Citation

Sinek, Simon. Leaders Eat Last: Why Some Teams Pull Together and Others Don't. Portfolio/Penguin, 2014.

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