Παραπομπή APA

John W Creswell. (2003). Research design: Qualitative, quantitative and mixed methods approaches. Sage.

Παραπομπή Chicago Style

John W Creswell. Research Design: Qualitative, Quantitative and Mixed Methods Approaches. New Delhi: Sage, 2003.

Παραπομπή MLA

John W Creswell. Research Design: Qualitative, Quantitative and Mixed Methods Approaches. Sage, 2003.