Creswell, J. W., & Creswell,David J. (2023). Research design: Qualitative, quantitative, and mixed methods approaches (6th.). Sage.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCreswell, John W., और Creswell,David J. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 6th. Los angeles: Sage, 2023.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCreswell, John W., और Creswell,David J. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 6th. Sage, 2023.
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