APA
Spengler J. O., . (2006). Risk Management in Sport and Recreation. : Human Kinetics.
Chicago
Spengler John Otto, . 2006. Risk Management in Sport and Recreation. : Human Kinetics.
Harvard
Spengler J. O., . (2006). Risk Management in Sport and Recreation. : Human Kinetics.
MLA
Spengler John Otto, . Risk Management in Sport and Recreation. : Human Kinetics. 2006.