Hay, J. G. The biomechanics of sports techniques. Prentice-Hall International Inc.
Lua i Stíl Chicago (17ú heag.)Hay, James G. The Biomechanics of Sports Techniques. Prentice-Hall International Inc.
Lua MLA (8ú heag.)Hay, James G. The Biomechanics of Sports Techniques. Prentice-Hall International Inc.
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