JOHN W CRESWELL. (2014). Research design: Qualitative, quantitative and mixed methods approaches. SAGE.
استشهاد بنمط شيكاغوJOHN W CRESWELL. Research Design: Qualitative, Quantitative and Mixed Methods Approaches. New Delhi: SAGE, 2014.
MLA استشهادJOHN W CRESWELL. Research Design: Qualitative, Quantitative and Mixed Methods Approaches. SAGE, 2014.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.