Creswell, J. W. (2009). Research design: Qualitative, quantitative, and mixed methods approaches (Third edition.). Sage Publications.
Citazione stile Chigago Style (17a edizione)Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. Third edition. Thousand Oaks, California: Sage Publications, 2009.
Citatione MLA (9a ed.)Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. Third edition. Sage Publications, 2009.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.