Creswell, J. W. (2014). Research design: Qualitative, quantitative, and mixed methods approaches. Thousand Oaks: SAGE Publications.
Trích dẫn kiểu ChicagoCreswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. Thousand Oaks: SAGE Publications, 2014.
Deismireacht MLACreswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. Thousand Oaks: SAGE Publications, 2014.
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