Huselid, M.A., & Ulrich, D. The HR scorecard :
Linking people, strategy, and performance. Boston,
MA: Harvard Business School Press.
Davison, B (2001). The importance of cost per hire. Workforce, January 2001
Fitz-enz, J. (2001). The E-Aligned Enterprise: How to Map and Measure Your Company's Course in the New Economy. New York, NY: AMACOM
Fitz-Enz, J. (2000). The ROI of human capital: Measuring the economic value of employee Performance. New York : Amacom.
Fiz-Enz. J. (1995). How to measure human resource management. New York : McGraw-Hill.
Phillips, J. (1996). Accountability in human resource management. Houston, Tex : Gulf Publ
Ulrich, D. (1997). Measuring Human Resources: An overview of practice and a prescription for results. Human Resource Management, 36 (3), 303-320.
Workforce (2001). Workforce, February 2001 pp35