5Sherill R.Loss Control Comes of Age. Professional Safety . 1980
6Loss Control Management. . 1976
7E Leonard ,,S Leopold.Costs of Construction Accidents to Employers. Journal of Occupational Accidents . 1987
8HSE(OU).The Cost of Accident at Work. . 1997
9P S Clark.Workplace Safety and Health Management Economic Cost-Benefit Analysis and Planning. Indirect Costs for Workplace Health & Safety Issues . 1996
10Bussiness Roundtable.Improving Construction Safety Performance : A Construction Industry Cost Effectiveness Project Report. Report A-3 . 19821