Creswell, J. W. (2014). Educational research: Planning, conducting, and evaluating quantitative and qualitative research (4. ed.). Pearson.
Chicago-Zitierstil (17. Ausg.)Creswell, John W. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative Research. 4. ed. Harlow: Pearson, 2014.
MLA-Zitierstil (9. Ausg.)Creswell, John W. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative Research. 4. ed. Pearson, 2014.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.