Berg, B. L. (2007). Qualitative research methods for the social sciences (6th ed.). Pearson/Allyn & Bacon.
Lua i Stíl Chicago (17ú heag.)Berg, Bruce L. Qualitative Research Methods for the Social Sciences. 6th ed. Boston: Pearson/Allyn & Bacon, 2007.
Lua MLA (8ú heag.)Berg, Bruce L. Qualitative Research Methods for the Social Sciences. 6th ed. Pearson/Allyn & Bacon, 2007.
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