1. Ausubel, D.P. (1968).Educational psychology: A cognitive view. New York: Holt, Rhinehart and Winston.
2. Beissner, K.L., & Reigeluth, C.M. (1994). A case study on course sequencing with multiple strands using the elaboration theory.Performance Improvement Quarterly, 7(2), 38–61.
3. Berg, E.V.D., Daal, V.V., & Beukhof, G. (1983).Structuring text according to the elaboration theory of instruction (E.T.I.): Learning processes and learning outcomes. Paper presented at the annual meeting of the American Educational Research Association (AERA).
4. Beukhof, G. (1986).Designing instructional texts: Interaction between text and learner. Paper presented at the annual meeting of the American Educational Research Association (AERA). ERIC No: ED274313
5. Boylestad, R.L. (1990).Introductory circuit analysis (6th Ed.). Columbus, OH: Merrill Publishing Co.