MLA
Puustjarvi, Juha, and Päivi Poyry. "Information Retrieval in Virtual Universities." Online and Distance Learning: Concepts, Methodologies, Tools, and Applications, edited by Lawrence A. Tomei, IGI Global, 2008, pp. 1676-1688. https://doi.org/10.4018/978-1-59904-935-9.ch133
APA
Puustjarvi, J. & Poyry, P. (2008). Information Retrieval in Virtual Universities. In L. Tomei (Ed.), Online and Distance Learning: Concepts, Methodologies, Tools, and Applications (pp. 1676-1688). IGI Global. https://doi.org/10.4018/978-1-59904-935-9.ch133
Chicago
Puustjarvi, Juha, and Päivi Poyry. "Information Retrieval in Virtual Universities." In Online and Distance Learning: Concepts, Methodologies, Tools, and Applications, edited by Lawrence A. Tomei, 1676-1688. Hershey, PA: IGI Global, 2008. https://doi.org/10.4018/978-1-59904-935-9.ch133
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