MLA
Downs, Robert. "The Intangibles." Encyclopedia of Distance Learning, Second Edition, edited by Patricia L. Rogers, et al., IGI Global, 2009, pp. 1220-1221. https://doi.org/10.4018/978-1-60566-198-8.ch175
APA
Downs, R. (2009). The Intangibles. In P. Rogers, G. Berg, J. Boettcher, C. Howard, L. Justice, & K. Schenk (Eds.), Encyclopedia of Distance Learning, Second Edition (pp. 1220-1221). IGI Global Scientific Publishing. https://doi.org/10.4018/978-1-60566-198-8.ch175
Chicago
Downs, Robert. "The Intangibles." In Encyclopedia of Distance Learning, Second Edition, edited by Patricia L. Rogers, et al., 1220-1221. Hershey, PA: IGI Global, 2009. https://doi.org/10.4018/978-1-60566-198-8.ch175
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