Cita APA

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

Chicago Edition Citation

Creswell, John W. Research Design: Qualitative, Quantitative and Mixed Methods Approaches. Los Angeles: sage, 2009.

Cita MLA

Creswell, John W. Research Design: Qualitative, Quantitative and Mixed Methods Approaches. sage, 2009.