Patton, W. (2001). Developmental Issue in Career Maturity and Career Decision Status. Career Developmental Quartely, June 2001. Available http://www.findarticles.com/p/articles/ mim0JAX/is449 /ai_807467.html. 7 Maret 2007.
Super. D.E., Savickas, M.L., & Super, C.M. (1996). The Life Span, Life-Space Approach To Careers. In Brown, D, Brocks, L & Associates (EDS). Career Choice and Development (3rd ed). California: Jessey Bass Inc. Terwillinger, J.S. (1963). Dimension of Occupational Preference Education and Psychological Measurement.
Seligman, Linda. (1994). Developmental Career Counseling and Assessment (2nd ed). Thousand Oaks: Sage.
Wahyono, Tekad. (2001). Efektivitas Pelatihan Persiapan Kerja Untuk Meningkatkan Kematangan Vokasional Pada Remaja. Jurnal Insan Media Psikologi. Vol. 3 No. 2 Agustus 2001, 99-108.
Southern, W. Thomas & Jones, Eric. D (1991). The Academic Acceleration of Gifted Children. New York: Teachers College Press. Spokane, A.R. (1991). Career Intervention. New Jersey: Prentice Hall. Santrock,
Winkel, W.S. & Hastuti, M.M. Sri. (2006). Bimbingan dan Konseling di Institusi Pendidikan. Yogyakarta: Media Abadi.
W.J. (2001). Educational Psychology. New York : McGraw Hill Companies.
12