Johnson, B., & Christensen, L. (2011). Educational research: Quantitative, qualitative, and mixed approaches (4th ed.). Sage.
Styl ChicagoJohnson, Burke, a Larry Christensen. Educational Research: Quantitative, Qualitative, and Mixed Approaches. 4th ed. Los Angeles: Sage, 2011.
Citace podle MLAJohnson, Burke, a Larry Christensen. Educational Research: Quantitative, Qualitative, and Mixed Approaches. 4th ed. Sage, 2011.
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