Creswell, J. W. (2009). Research design: Qualitative, quantitative, and mixed methods approaches (Third edition.). Sage Publications.
Citace podle Chicago (17th ed.)Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. Third edition. Thousand Oaks, California: Sage Publications, 2009.
Citace podle MLA (9th ed.)Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. Third edition. Sage Publications, 2009.
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