Cita APA (7th ed.)

Creswell, J. W. (2009). Research design: Qualitative, quantitative, and mixed methods approaches (3a. ed.). SAGE.

Cita Chicago (17th ed.)

Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 3a. ed. Los Angeles: SAGE, 2009.

Cita MLA (9th ed.)

Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 3a. ed. SAGE, 2009.