MLA
Magoulas, George D. "User Modeling in Information Portals." Encyclopedia of Portal Technologies and Applications, edited by Arthur Tatnall, IGI Global, 2007, pp. 1068-1073. https://doi.org/10.4018/978-1-59140-989-2.ch175
APA
Magoulas, G. D. (2007). User Modeling in Information Portals. In A. Tatnall (Ed.), Encyclopedia of Portal Technologies and Applications (pp. 1068-1073). IGI Global Scientific Publishing. https://doi.org/10.4018/978-1-59140-989-2.ch175
Chicago
Magoulas, George D. "User Modeling in Information Portals." In Encyclopedia of Portal Technologies and Applications, edited by Arthur Tatnall, 1068-1073. Hershey, PA: IGI Global, 2007. https://doi.org/10.4018/978-1-59140-989-2.ch175
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