Koop, J., & Rutberg, J. (2016). Training essentials for ultrarunning: How to train smarter, race faster, and maximize your ultramarathon performance. VeloPress.
Cita Chicago Style (17a ed.)Koop, Jason, y Jim Rutberg. Training Essentials for Ultrarunning: How to Train Smarter, Race Faster, and Maximize Your Ultramarathon Performance. Boulder, Colorado: VeloPress, 2016.
Cita MLA (8a ed.)Koop, Jason, y Jim Rutberg. Training Essentials for Ultrarunning: How to Train Smarter, Race Faster, and Maximize Your Ultramarathon Performance. VeloPress, 2016.
Precaución: Estas citas no son 100% exactas.