Strauss, Anselm L.
Basics of qualitative research : grounded theory procedures and techniques
Sage, 1990.
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Bryant, Antony
Grounded theory and grounded theorizing: pragmatism in research practice
Oxford University Press, 2017
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Strauss, Anselm L.
Basics of qualitative reserach: techniques and procedures for developing grounded theory
Sage, 1998
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Marshall, Catherine
Designing qualitative research
Sage, 1999
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Silverman, David
Doing qualitative research
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