Qualitative GIS : a mixed methods approach
edited by Meghan Cope and Sarah Elwood
SAGE Publications, 2009
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Creswell, John W.
Research design : qualitative, quantitative, and mixed methods approaches
Sage Publication, Inc, 2003
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Creswell, John W.
Research design : qualitative, quantitative, and mixed methods approaches
Sage, 2014
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Creswell, John W.
Research design : qualitative, quantitative, and mixed methods approaches
Sage, 2018
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Mertens, Donna M.
Research and evaluation in education and psychology : integrating diversity with quantitative, qualitative, and mixed methods
SAGE, 2014
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