1. Agodini, R., & Dynarski, M. (2000). Understanding the trend toward alternative certification for high school graduates. Princeton, NJ: Mathematica Policy Research.
2. Barry, M. (2007). Vocational education and training in Ireland: Thematic overview. Dublin: Training and Employment Authority. Retrieved from
http://www.fas.ie/NR/rdonlyres/9ABC5EE1-CF20-4AA5-ACA4-C5B81DD9FE5E/437/PDFonline_vet_in_ireland_2009994.pdf
3. Berktold, J., Geis, S., & Kaufman, P. (1998). Subsequent educational attainment of high school dropouts. Washington, DC: National Center for Education Statistics.
4. Bishop, J., & Mane, F. (2004). The impacts of career-technical education on high school labour market success. Economics of Education Review, 23, 381–402.
5. Boesel, D., Alsalam, N., & Smith, T. (1998). Educational and labour market outcomes of GED certification. Washington, DC: National Library of Education, Office of Educational Research and Improvement, U.S. Department of Education.