MLA
Halpin, Terry. "Enriched Conceptualization of Subtyping." Innovations in Information Systems Modeling: Methods and Best Practices, edited by Terry Halpin, et al., IGI Global, 2009, pp. 1-16. https://doi.org/10.4018/978-1-60566-278-7.ch001
APA
Halpin, T. (2009). Enriched Conceptualization of Subtyping. In T. Halpin, J. Krogstie, & E. Proper (Eds.), Innovations in Information Systems Modeling: Methods and Best Practices (pp. 1-16). IGI Global. https://doi.org/10.4018/978-1-60566-278-7.ch001
Chicago
Halpin, Terry. "Enriched Conceptualization of Subtyping." In Innovations in Information Systems Modeling: Methods and Best Practices, edited by Terry Halpin, John Krogstie, and Erik Proper, 1-16. Hershey, PA: IGI Global, 2009. https://doi.org/10.4018/978-1-60566-278-7.ch001
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