Ash, M. J., Magill, R. A., & Smoll, F. L. (1988). Children in sport (3rd ed.). Human Kinetics.
Lua i Stíl Chicago (17ú heag.)Ash, Michael J., Richard A. Magill, agus Frank L. Smoll. Children in Sport. 3rd ed. Champaign, Ill: Human Kinetics, 1988.
Lua MLA (9ú heag.)Ash, Michael J., et al. Children in Sport. 3rd ed. Human Kinetics, 1988.
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