Sari Wahyuni
Penerbit Salemba Empat, 2011
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Clive, Seale, Giampietro Gobo, Jaber F. Gubrium, David Silverman
Sage Publications, 2008
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Marshall, Catherine
Sage, 1999
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Silverman, David
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Walle, Alf H.
Quorum Books, 2001
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