The Working Healthy Project: A Worksite Health-Promotion Trial Targeting Physical Activity, Diet and Smoking. JOEM; Vol 41.No. 7, July 1999.
World Health Organization. (2003). Noncommunicable Disease Prevention and Health Promotion. Economic Benefits of Physical Activity. [On-line]. Available: http://whqlibdoc.who.int/hq/2003/WHO_NMH_NPH_PAH_03.2.pdf