[1] Harlan, C. In South Korean Classrooms, Digital Textbook Revolution Meets Some Resistance. Washington Post. http://www.washingtonpost.com/world/asia_pacific/in-south-korean-classrooms-digital-textbook-revolution-meets-some-resistance/2012/03/21/gIQAxiNGYS_story_1.html
[2] Byun, H., Yoo, K., Yoo, J., Choi, J. and Park, S. (2005) 2005 Study on Standardization of Electronic Textbook Development. KERIS, Research Report CR 2005-22.
[3] Kim, H.S., Lee, Y.-A., Lee, D.Y. and Leem, J. (2013) Development of Teaching and Learning Models for the Effective Use of Paper and Digital Textbooks. KICE, Research Report RRT 2013-2.
[4] Noh, K., Kim, B. and Lee, W. (2011) 2010 Digital Textbook Effectiveness Research. KERIS, Research Report CR 2011-1.
[5] Ministry of Education (2011) The Pathway to Great Human Resource Nation: SMART Education Strategy Implementation Plan. Ministry of Education. Unpublished document.
[6] Song, Y. and Byun, H. (2010) Status of Digital Textbooks and Its Challenges. Review of Korean Society of Internet Information, 28, 58-63.
[7] Joo, H., Ahn, J., Ga, E. and Nam, C. (2013) A Study on the Development of Digital Textbooks: Designing a Prototype for English Digital Textbooks. KICE, Research Report RRT 2013-1-1.
[8] Glaser, B.G. and Strauss, A.L. (1967) The Discovery of Grounded Theory. Aldinede Gruyter, New York.
[9] Glaser, B.G. and Strauss, A.L. (1965) Awareness of Dying. Aldine de Gruyter, New York.
[10] Eisner, E.W. (1979) The Educational Imagination. Macmillan, New York.
[11] Tyler, R.W. (1949) Education 206: Basic Principles of Curriculum and Instruction. University of Chicago Press, Chicago.
[12] Taba, H. (1962) Curriculum Development: Theory and Practice. Harcourt, Brace & Jovanovich, New York.