Heck, J. F., Clarke, K. S., Peterson, T. R., Torg, J. S., & Weis, M. P. (2004). National Athletic Trainers' Association Position Statement: Head-Down Contact and Spearing in Tackle Football. National Athletic Trainers' Association, Inc.
シカゴスタイル引用形Heck, Jonathan F., Kenneth S. Clarke, Thomas R. Peterson, Joseph S. Torg, , Michael P. Weis. National Athletic Trainers' Association Position Statement: Head-Down Contact and Spearing in Tackle Football. National Athletic Trainers' Association, Inc, 2004.
MLA引用形式Heck, Jonathan F., et al. National Athletic Trainers' Association Position Statement: Head-Down Contact and Spearing in Tackle Football. National Athletic Trainers' Association, Inc, 2004.
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