Creswell, J. W., & Creswell, J. D. (2018). Research design: Qualitative, quantitative, and mixed methods approaches (5a. ed.). SAGE Publications.
Chicago Style (17. basım) AtıfCreswell, John W., ve J. David Creswell. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 5a. ed. Londres: SAGE Publications, 2018.
MLA (9th ed.) AtıfCreswell, John W., ve J. David Creswell. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 5a. ed. SAGE Publications, 2018.
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