Silverman, D. (2013). Doing qualitative research (4th ed.). Sage.
Tohutoru Kātū Chicago (17th ed.)Silverman, David. Doing Qualitative Research. 4th ed. Los Angelws: Sage, 2013.
Tohutoro MLA (9th ed.)Silverman, David. Doing Qualitative Research. 4th ed. Sage, 2013.
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