APA (7th ed.) Citation

Koop, J., & Rutberg, J. (2016). Training essentials for ultrarunning: How to train smarter, race faster, and maximize your ultramarathon performance. VeloPress.

Chicago Style (17th ed.) Citation

Koop, Jason, and Jim Rutberg. Training Essentials for Ultrarunning: How to Train Smarter, Race Faster, and Maximize Your Ultramarathon Performance. Boulder, Colorado: VeloPress, 2016.

MLA (8th ed.) Citation

Koop, Jason, and Jim Rutberg. Training Essentials for Ultrarunning: How to Train Smarter, Race Faster, and Maximize Your Ultramarathon Performance. VeloPress, 2016.

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