President's Council on Physical Fitness and Sports (U.S.). Physical fitness research digest. President's Council on Physical Fitness and Sports.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)President's Council on Physical Fitness and Sports (U.S.). Physical Fitness Research Digest. Washington,: President's Council on Physical Fitness and Sports.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)President's Council on Physical Fitness and Sports (U.S.). Physical Fitness Research Digest. President's Council on Physical Fitness and Sports.
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