Cita APA (7a ed.)

Creswell, J. W. (2009). Research design: Qualitative, quantitative, and mixed method approaches (3rd ed.). Sage Publications.

Cita Chicago Style (17a ed.)

Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Method Approaches. 3rd ed. Thousand Oaks, Calif.: Sage Publications, 2009.

Cita MLA (9a ed.)

Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Method Approaches. 3rd ed. Sage Publications, 2009.