| | Dạng tài liệu: |  |  | Thông tin mô tả: | Creswell, John W Research design : Qualitative, quantitative, and mixed methods approaches / John W. Creswell, J. David Creswell
 Thousand Oaks, California : SAGE Publications, Inc., 2023
 291 pages : illustrations ; 25 cm
 
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