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Dalton, M., Lombardo, M. M., McCauley, C. D., McDonald-Mann, D., Moxley, R., and Wachholz, J. Benchmarks: Developmental Reference Points: A Manual and Trainer's Guide. Greensboro, N.C.: Center for Creative Leadership, 1997.
Lombardo, M. M., and Eichinger, R. W. For Your Improvement: A Development and Coaching Guide. Minneapolis: Lominger, 1996.
Judith L. Steed is a research analyst and feedback consultant at CCL in Colorado Springs. She holds an M.S. degree from Virginia Polytechnic Institute and State University.
Gina Hernez-Broome is a research associate at CCL in Colorado Springs. She holds a Ph.D. degree from Colorado State University.