Educational research : planning, conducting, and evaluating quantitative and qualitative research / John W. Creswell, University of Michigan, Timothy C. Guetterman, University of Michigan.
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Edizioa: | Sixth edition. |
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Argitaratua: |
New York, NY :
Pearson,
[2019]
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Formatua: | Baliabide elektronikoa eBook |