Creswell, J. W. (2005). Educational research: Planning, conducting, and evaluating quantitative and qualitative research (2nd ed.). Upper Saddle River, N.J.: Merrill.
Trích dẫn theo kiểu ChicagoCreswell, John W. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative Research. 2nd ed. Upper Saddle River, N.J.: Merrill, 2005.
Trích dẫn MLACreswell, John W. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative Research. 2nd ed. Upper Saddle River, N.J.: Merrill, 2005.
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