APA aipamena

Creswell, J. W., & Creswell, J. D. (2018). Research design: Qualitative, quantitative, and mixed methods approaches. Los Angeles: Sage.

Chicago Style aipamena

Creswell, John W., và J. David Creswell. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. Los Angeles: Sage, 2018.

MLA aipamena

Creswell, John W., và J. David Creswell. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. Los Angeles: Sage, 2018.