Creswell, J. W. (2009). Research design: Qualitative, quantitative, and mixed methods approaches (3rd ed.). Sage Publications.
Chicago Style citaatCreswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 3rd ed. N.Delhi: Sage Publications, 2009.
MLA citatieCreswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 3rd ed. Sage Publications, 2009.
Let op: Deze citaties zijn niet altijd 100% accuraat.