Creswell, J. W. Research design: Qualitative, quantitative, and mixed methods approaches (6th ed.). SAGE Publications.
Citace podle Chicago (17th ed.)Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 6th ed. Los Angeles: SAGE Publications.
Citace podle MLA (9th ed.)Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 6th ed. SAGE Publications.
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