Cita APA (7th ed.)

Creswell, J. W. (2014). Research design: Qualitative, quantitative, and mixed methods approaches (4a. ed.). Sage.

Cita Chicago (17th ed.)

Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 4a. ed. Thousand Oaks: Sage, 2014.

Cita MLA (9th ed.)

Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 4a. ed. Sage, 2014.