Creswell, J. W. Educational research: Planning, conducting, and evaluating quantitative and qualitative.
Chicago-referens (17:e uppl.)Creswell, J. W. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative.
MLA-referens (8:e uppl.)Creswell, J. W. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.