Creswell, J. W., & Creswell, J. D. (2018). Research design: Qualitative, quantitative, and mixed methods approaches. Los Angeles: Sage.
استشهاد بنمط شيكاغوCreswell, John W., و J. David Creswell. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. Los Angeles: Sage, 2018.
MLA استشهادCreswell, John W., و J. David Creswell. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. Los Angeles: Sage, 2018.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.