Creswell, J. W. (1994). Research design: Qualitative & quantitative approaches. Sage Pub.
Chicago Style (17th ed.) CitationCreswell, John W. Research Design: Qualitative & Quantitative Approaches. Thousand Oaks, CA: Sage Pub, 1994.
ציטוט MLACreswell, John W. Research Design: Qualitative & Quantitative Approaches. Sage Pub, 1994.
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