Creswell, J. W. (2021). Educational research: Planning, conducting, and evaluating quantitative and qualitative research (Sixth edition, global edition.). Pearson Education Limited.
Lua i Stíl Chicago (17ú heag.)Creswell, John W. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative Research. Sixth edition, global edition. Harlow, Essex, United Kingdom: Pearson Education Limited, 2021.
Lua MLA (9ú heag.)Creswell, John W. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative Research. Sixth edition, global edition. Pearson Education Limited, 2021.
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