Patton, M. Q. (1987). How to use qualitative methods in evaluation. Sage Publications.
Lua i Stíl Chicago (17ú heag.)Patton, Michael Quinn. How to Use Qualitative Methods in Evaluation. Newbury Park, Calif.: Sage Publications, 1987.
Lua MLA (8ú heag.)Patton, Michael Quinn. How to Use Qualitative Methods in Evaluation. Sage Publications, 1987.
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