Herr, E.L. and Cramer, S.H.Vocational Guidance and Career Development in the Schools: Toward a Systems Approach. Boston: Houghton Mifflin Co., 1972.
2.
Hoepfner, R., Conniff, Jr., W.A., Hufano, L., Bastone, M., Ogilvie, V.N., Hunter, R., and Johnson, B.L.CSE Secondary School Test Evaluations: Grades 11 and 12. Los Angeles: Center for the Study of Evaluation, UCLA , 1974.
3.
Super, D.E. "A Theory of Vocational Development", American Psychologist , 1953, 8, 185-190.
4.
Super, D.E. "Vocational Development in Adolescence and Early Adulthood: Tasks and Behaviors", In Super, D. E. et al., Career Development: Self Concept Theory. New York: CEEB Research Monograph No. 4, 1963.