APA aipamena

Spengler, J. O. (2006). Risk management in sport and recreation. Human Kinetics.

Chicago Style aipamena

Spengler, John O. Risk Management in Sport and Recreation. Champaign, IL: Human Kinetics, 2006.

MLA aipamena

Spengler, John O. Risk Management in Sport and Recreation. Human Kinetics, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.