MLA
Graham, Charles G., and Stephanie Allen. "Designing Blended Learning Environments." Encyclopedia of Distance Learning, Second Edition, edited by Patricia L. Rogers, et al., IGI Global, 2009, pp. 562-570. https://doi.org/10.4018/978-1-60566-198-8.ch082
APA
Graham, C. G. & Allen, S. (2009). Designing Blended Learning Environments. In P. Rogers, G. Berg, J. Boettcher, C. Howard, L. Justice, & K. Schenk (Eds.), Encyclopedia of Distance Learning, Second Edition (pp. 562-570). IGI Global Scientific Publishing. https://doi.org/10.4018/978-1-60566-198-8.ch082
Chicago
Graham, Charles G., and Stephanie Allen. "Designing Blended Learning Environments." In Encyclopedia of Distance Learning, Second Edition, edited by Patricia L. Rogers, et al., 562-570. Hershey, PA: IGI Global, 2009. https://doi.org/10.4018/978-1-60566-198-8.ch082
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