Hamel, J., Dufour, S., & Fortin, D. (1993). Case study methods. Sage Publications.
Lua i Stíl Chicago (17ú heag.)Hamel, Jacques, St�ephane Dufour, agus Dominic Fortin. Case Study Methods. Newbury Park ; New Delhi: Sage Publications, 1993.
Lua MLA (8ú heag.)Hamel, Jacques, et al. Case Study Methods. Sage Publications, 1993.
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