660 Second Ab Workout60 Second Ab Workoutde Logan ChristopherEdiciones (1)60 Second Ab Workout (2013)CreateSpace Independent Publishing Platform · inglés · ISBN 9781481899178Más obras de Logan ChristopherZZombie XZombie XMental Muscle, How to Use the Full Power of Your Mind to Develop Superhuman StrengthUUltimate Guide to Bodyweight Squats and PistolsUltimate Guide to Bodyweight Squats and Pistols