Goldenberg, L., & Twist, P. (2007). Strength ball training (2nd ed.). Human Kinetics.
Lua i Stíl Chicago (17ú heag.)Goldenberg, Lorne, agus Peter Twist. Strength Ball Training. 2nd ed. Champaign, Ill.: Human Kinetics, 2007.
Lua MLA (9ú heag.)Goldenberg, Lorne, agus Peter Twist. Strength Ball Training. 2nd ed. Human Kinetics, 2007.
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