Creswell, John W.
Qualitative inquiry and research design : choosing among five traditions
Sage, 1998
Buku Teks SO
Creswell, John W.
Research design : qualitative, quantitative, approaches
Sage, 1994
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Grinnell, Richard M.
Social work research and evaluation : quantitative and qualitative approaches
F.E. Peacock, 2001
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Creswell, John W.
Research design : qualitative, quantitative, and mixed methods approaches
Sage, 2018
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Neuman, William Lawrence, 1950-
Social research methods: qualitative and quantitative approaches
Allyn and Bacon, 2003
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