MLA
Boettcher, Judith V. "Design Levels for Distance and Online Learning." Encyclopedia of Information Science and Technology, First Edition. IGI Global, 2005. 802-809. Web. 17 Jun. 2019. doi:10.4018/978-1-59140-553-5.ch140
APA
Boettcher, J. V. (2005). Design Levels for Distance and Online Learning. In M. Khosrow-Pour, D.B.A. (Ed.), Encyclopedia of Information Science and Technology, First Edition (pp. 802-809). Hershey, PA: IGI Global. doi:10.4018/978-1-59140-553-5.ch140
Chicago
Boettcher, Judith V. "Design Levels for Distance and Online Learning." In Encyclopedia of Information Science and Technology, First Edition, ed. Mehdi Khosrow-Pour, D.B.A., 802-809 (2005), accessed June 17, 2019. doi:10.4018/978-1-59140-553-5.ch140
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