APA (7th ed.) Zitazioa
Creswell, J. W. (2014). Research design: Qualitative, quantitative, and mixed methods approaches (4th ed.). SAGE Publications.
Chicago Style (17th ed.) Zitazioa
Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 4th ed. Thousand Oaks: SAGE Publications, 2014.
MLA (9th ed.) Zitazioa
Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 4th ed. SAGE Publications, 2014.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.