Heyward, V. H. (1998). Advanced fitness assessment & exercise prescription (3rd ed.). Human Kinetics.
Lua i Stíl Chicago (17ú heag.)Heyward, Vivian H. Advanced Fitness Assessment & Exercise Prescription. 3rd ed. Champaign, Ill: Human Kinetics, 1998.
Lua MLA (9ú heag.)Heyward, Vivian H. Advanced Fitness Assessment & Exercise Prescription. 3rd ed. Human Kinetics, 1998.
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