Shephard, R. J., Jequier, J. C., LaBarre, R., and Rajie, M. (1980). Habitual physical activity.
Kales M. L. & Sangria M. S. “Physical and History of Physical Education”, Parkas Brothers, Ludhiana 1988.
Gail Brenner (2003) Webster's New World American Idioms Handbook. Webster's New World.Nathan M. Murata(2003)Language Augmentation Strategies in Physical Education The Journal of Physical Education,Recreation & Dance, Vol. 74.