APA (7th ed.) Zitazioa

Creswell, J. W. (2009). Research design: Quqlitative,quantitative and mixed methods approaches. Sage.

Chicago Style (17th ed.) Zitazioa

Creswell, John W. Research Design: Quqlitative,quantitative and Mixed Methods Approaches. New Delhi: Sage, 2009.

MLA (9th ed.) Zitazioa

Creswell, John W. Research Design: Quqlitative,quantitative and Mixed Methods Approaches. Sage, 2009.