Creswell, J. W. (2012). Educational Research: Planning, conducting, and evaluating quantitative and qualitative research (4th ed.). Pearson.
Chicago-viite (17. p.)Creswell, John W. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative Research. 4th ed. Noida: Pearson, 2012.
MLA-viite (9. p.)Creswell, John W. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative Research. 4th ed. Pearson, 2012.
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