[1] Graham, C. R, (2013), Emerging practice and research in blended learning, Handbook of distance education, 3, p.333-350.
[2] Henrie, C. R., Halverson, L. R., & Graham, C. R, (2015), Measuring student engagement in technologymediated learning: A review, Computers & Education, 90, p.36-53.
[3] Drysdale, J. S., Graham, C. R., Spring, K. J., & Halverson, L. R, (2013), An analysis of research trends in dissertations and theses studying blended learning, The Internet and Higher Education, 17, 90-100
[4] Picciano, A. G., Seaman, J., Shea, P., & Swan, K, (2012), Examining the extent and nature of online learning in American K-12 education: The research initiatives of the Alfred P. Sloan Foundation, The Internet and Higher Education, 15(2), p.127-135.
[5] Allen, I. E., & Seaman, J, (2013), Changing course: Ten years of tracking online education in the United States: ERIC.
[6] Garrison, D. R, (2016), E-learning in the 21st century: A community of inquiry framework for research and practice, Routledge.
[7] Moskal, P., Dziuban, C., & Hartman, J, (2013), Blended learning: A dangerous idea?,The Internet and Higher Education, 18, p.15-23.
[8] Oliver, M., & Trigwell, K, (2005), Can ‘blended learning’be redeemed?, E-learning and Digital Media, 2(1), p.17-26.
[9] Graham, C. R, (2009), Blended learning models Encyclopedia of Information Science and Technology, Second Edition, pp. 375-382, IGI Global.
[10] Picciano, A, (2009), Blending with purpose: The multimodal model, Journal of the Research Center for Educational Technology, 5(1), p.4-14.
[11] Sitzmann, T., Kraiger, K., Stewart, D., & Wisher, R, (2006), The comparative effectiveness of web‐based and classroom instruction: A meta‐analysis, Personnel psychology, 59(3), p.623-664
[12] Means, B., Toyama, Y., Murphy, R., Bakia, M., & Jones, K, (2009), Evaluation of evidence-based practices in online learning: A meta-analysis and review of online learning studies.
[13] Hattie, J, (2008), Visible learning: A synthesis of over 800 meta-analyses relating to achievement: routledge.
[14] Graham, C. R, (2018), Current research in blended learning, Handbook of distance education, 173-188.
[15] Gikandi, J. W., Morrow, D., & Davis, N. E, (2011), Online formative assessment in higher education: A review of the literature, Computers & Education, 57(4), p.2333-2351
[16] Garrison, D. R., & Vaughan, N. D, (2008), Blended learning in higher education: Framework, principles, and guidelines, John Wiley & Sons.
[17] Wlodkowski, R. J., & Ginsberg, M. B, (2017), Enhancing adult motivation to learn: A comprehensive guide for teaching all adults, John Wiley & Sons.
[18] Rogers, P. C., Graham, C. R., & Mayes, C. T, (2007), Cultural competence and instructional design: Exploration research into the delivery of online instruction cross-culturally, Educational Technology Research and Development, 55(2), p.197-217.