권정식. (1995). 중학교 야구선수의 포지션 그룹별 체력 에 관한 연구. 학교보건체육연구소 논문집, 2(1), 17-27.
Kwon Jung-Shik. (1995). A Study on Physical Strength in Position in Groups of the Middle School Baseball Players. The Journal of Institute of School Health & Physical Education, 2(1), 17-27.