Qualitative research
edited by Alan Bryman, Robert G. Burgess
SAGE Publication, 1999
 Buku Teks SO
Qualitative research practice Principles of risk management and insurance
Clive, Seale, Giampietro Gobo, Jaber F. Gubrium, David Silverman
Sage Publications, 2008
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Qualitative research in social work / edited, Edmund Sherman
Columbia University Press, 1994
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Silverman, David
Doing qualitative research / David Silverman
Sage , 2013
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Patton, Michael Quinn
Qualitative research and evaluation methods
SAGE, 2015
 Buku Teks