Hamel, J., Dufour, S., & Fortin, D. (1993). Case study methods. Sage.
Chicago Style aipamenaHamel, Jacques, Stephane Dufour, and Dominic Fortin. Case Study Methods. Newbury Park: Sage, 1993.
MLA aipamenaHamel, Jacques, et al. Case Study Methods. Sage, 1993.
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