Milligan, J. (2005). Swiss ball for total fitness: A step-by-step guide improve strength & stability 20-minute workouts. PRC Publishing.
Chicago-Zitierstil (17. Ausg.)Milligan, James. Swiss Ball for Total Fitness: A Step-by-step Guide Improve Strength & Stability 20-minute Workouts. Bramley Road, London: PRC Publishing, 2005.
MLA-Zitierstil (9. Ausg.)Milligan, James. Swiss Ball for Total Fitness: A Step-by-step Guide Improve Strength & Stability 20-minute Workouts. PRC Publishing, 2005.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.