MLA
Olla, Phillip, and Rod Crider. "Open-Source Online Knowledge Portals for Education." Encyclopedia of Portal Technologies and Applications, edited by Arthur Tatnall, IGI Global, 2007, pp. 684-688. https://doi.org/10.4018/978-1-59140-989-2.ch113
APA
Olla, P. & Crider, R. (2007). Open-Source Online Knowledge Portals for Education. In A. Tatnall (Ed.), Encyclopedia of Portal Technologies and Applications (pp. 684-688). IGI Global. https://doi.org/10.4018/978-1-59140-989-2.ch113
Chicago
Olla, Phillip, and Rod Crider. "Open-Source Online Knowledge Portals for Education." In Encyclopedia of Portal Technologies and Applications, edited by Arthur Tatnall, 684-688. Hershey, PA: IGI Global, 2007. https://doi.org/10.4018/978-1-59140-989-2.ch113
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