Spengler, J. O. (2006). Risk management in sport and recreation. Human Kinetics.
Chicagoスタイル(17版)引用形式Spengler, John O. Risk Management in Sport and Recreation. Champaign, IL: Human Kinetics, 2006.
MLA(9版)引用形式Spengler, John O. Risk Management in Sport and Recreation. Human Kinetics, 2006.
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