Ainsworth, B.E. (2002). Compendium of Physical Activities Tracking Guide. Prevention Research Center, Norman J. Arnold Schol of Publicv Health, University of South Carolina. Retrieved June, 2003, from the World Wide Web: http://prevention.sph.sc.edu/tools/compendium.htm

Guthrie, H and Picciano, J. (1995). Human Nutrition. St. Louis: Times Mirror Publishing

Pangrazi, R., Beighle, A. & Sidman, C. (2003). Pedometer power. Champaign, IL: Human Kinetics Publishers.

Taylor, CM, & McLeod, G. (1949). Rose's laboratory handbook of dietetics. New York: Macmillan.

Tudor-Locke, C. (2003). Manpo-Kei. Victoria, British Columbia: Trafford Publishing.