Johnson, B., & Christensen, L. (2011). Educational research: Quantitative, qualitative, and mixed approaches (4th ed.). Sage.
Styl cytowania ChicagoJohnson, Burke, i Larry Christensen. Educational Research: Quantitative, Qualitative, and Mixed Approaches. 4th ed. Los Angeles: Sage, 2011.
Styl cytowania MLAJohnson, Burke, i Larry Christensen. Educational Research: Quantitative, Qualitative, and Mixed Approaches. 4th ed. Sage, 2011.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..