APA-referens (7:e uppl.)
Creswell, J. W. (2009). Research design: Qualitative, quantitative, and mixed methods approaches (3rd ed.). Sage.
Chicago-referens (17:e uppl.)
Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 3rd ed. Thousand Oaks, CA: Sage, 2009.
MLA-referens (9:e uppl.)
Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 3rd ed. Sage, 2009.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.