APA (7th ed.) Zitazioa
John, B., & Christensen, . L. (2012). Educational research: Quantitative, qualitative and mixed approaches (4th ed.). Sage.
Chicago Style (17th ed.) Zitazioa
John, Burke, eta Larry Christensen. Educational Research: Quantitative, Qualitative and Mixed Approaches. 4th ed. Thousand Oask, Calif.: Sage, 2012.
MLA (9th ed.) Zitazioa
John, Burke, eta Larry Christensen. Educational Research: Quantitative, Qualitative and Mixed Approaches. 4th ed. Sage, 2012.
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