RICHARDS, L. (2015). Handling qualitative data 3rd ed. Sage.
Lua i Stíl Chicago (17ú heag.)RICHARDS, Lyn. Handling Qualitative Data 3rd Ed. Sage, 2015.
Lua MLA (8ú heag.)RICHARDS, Lyn. Handling Qualitative Data 3rd Ed. Sage, 2015.
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