APA (7th ed.) Citation

Hawkins, T. (2013). Why wait to be great: It's either now or too late. Berrett-Koehler.

Chicago Style (17th ed.) Citation

Hawkins, Terry. Why Wait to Be Great: It's Either Now or Too Late. San Francisco: Berrett-Koehler, 2013.

MLA (8th ed.) Citation

Hawkins, Terry. Why Wait to Be Great: It's Either Now or Too Late. Berrett-Koehler, 2013.