Competency assessment methods : history and state of the art

Competence at work : models for superior performance

Spencer, Lyle M., (1993)

Reengineering human resources : achieving radical increases in service quality with 50% to 90% cost and head count reductions

Spencer, Lyle M., (1995)

Calculating human resource costs and benefits : cutting costs and improving productivity

Spencer, Lyle M., (1986)