Gagné, E. D., Yekovich, C. W., & Yekovich, F. R. (1993). The cognitive psychology of school learning (2a. ed.). Harpers Collins.
Chicago Style (17. basım) AtıfGagné, Ellen D., Carol Walker Yekovich, ve Frank R. Yekovich. The Cognitive Psychology of School Learning. 2a. ed. Nueva York: Harpers Collins, 1993.
MLA (9th ed.) AtıfGagné, Ellen D., et al. The Cognitive Psychology of School Learning. 2a. ed. Harpers Collins, 1993.
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