Hay, J. G. (1973). The biomechanics of sports techniques. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Hay, James G. The Biomechanics of Sports Techniques. Englewood Cliffs, N.J: Prentice-Hall, 1973.
Lua MLA (9ú heag.)Hay, James G. The Biomechanics of Sports Techniques. Prentice-Hall, 1973.
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