Creswell,John W. (2009). Research Design: Qualitative, Quantitative, and Mixed Methods Approaches (3rd.). Sage.
Chicago (17e ed.) BronvermeldingCreswell,John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 3rd. New Delhi: Sage, 2009.
MLA (9e ed.) BronvermeldingCreswell,John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 3rd. Sage, 2009.
Let op: Deze citaties zijn niet altijd 100% accuraat.