APA (7th ed.) Citation

Grover, T., & Wenk, S. L. (2013). Relentless: From good to great to unstoppable. Scribner.

Chicago Style (17th ed.) Citation

Grover, Tim, and Shari Lesser Wenk. Relentless: From Good to Great to Unstoppable. New York: Scribner, 2013.

MLA (9th ed.) Citation

Grover, Tim, and Shari Lesser Wenk. Relentless: From Good to Great to Unstoppable. Scribner, 2013.