Creswell, J. W., & Guetterman, T. C. (2019). Educational research: Planning, conducting, and evaluating quantitative and qualitative research (Sixth edition.). Pearson.
Chicago-Zitierstil (17. Ausg.)Creswell, John W., und Timothy C. Guetterman. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative Research. Sixth edition. Saddle River, New Jersey: Pearson, 2019.
MLA-Zitierstil (9. Ausg.)Creswell, John W., und Timothy C. Guetterman. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative Research. Sixth edition. Pearson, 2019.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.