Creswell, J. W. (2014). Research design: Qualitative, quantitative, and mixed methods approaches (4th ed.). SAGE Publications.
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Chicago-čujuhus (17. p.)
Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 4th ed. Thousand Oaks: SAGE Publications, 2014.
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MLA-čujuhus (9. p.)
Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 4th ed. SAGE Publications, 2014.
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