1. Allen, K. R. (1981, June). An effective measurement of performance. VocEd, 56, 39–40.
2. Bachmura, F. T. (1963). The manpower development and training act of 1962—its significance for rural areas. Journal of Farm Economics, 45(1), 61–72.
3. Barlow, M. L. (Ed.). (1974). The philosophy for quality vocational education programs. Washington, DC: American Vocational Association.
4. Bloom, B. S. (Ed.). (1956). Taxonomy of educational objectives. Handbook I: Cognitive domain. New York: David McKay.
5. Brewer, E. W., Campbell, A. C., & Petty, G. C. (2000). Foundations of workforce education: Historical, philosophical, and theoretical applications. Dubuque: Kendall/Hunt Publishers.