Frederick, A., & Frederick, C. (2017). Stretch to win (Second edition.). Human Kinetics.
Lua i Stíl Chicago (17ú heag.)Frederick, Ann, agus Chris Frederick. Stretch to Win. Second edition. Champaign, IL: Human Kinetics, 2017.
Lua MLA (9ú heag.)Frederick, Ann, agus Chris Frederick. Stretch to Win. Second edition. Human Kinetics, 2017.
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