Haertel, G. D., Means, B., & Roberts, L. G. (2003). Evaluating educational technology: Effective research designs for improving learning. Teachers College Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)Haertel, Geneva D., Barbara Means, και Linda G. Roberts. Evaluating Educational Technology: Effective Research Designs for Improving Learning. New York: Teachers College Press, 2003.
Παραπομπή σε μορφή MLA (9th εκδ.)Haertel, Geneva D., et al. Evaluating Educational Technology: Effective Research Designs for Improving Learning. Teachers College Press, 2003.
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