Handbook of qualitative research : second edition
Norman K. Denzin, Yvonna S. Lincoln, editors
Sage Publications, 2000
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Strauss, Anselm L.
Qualitative analysis for social scientists
Cambrigde University Press, 1987
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Patton, Michael Quinn
Qualitative evaluation and research methods
Sage, 1990
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Ritzer, George
Handbook teori sosial
Nusa Media, 2012
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Handbook for social studies teaching: the Association of Teachers of Social Studies;
Hilt, Rinehart and Winston, 1967
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