Gagné, E. D., Yekovich, C. W., & Yekovich, F. R. (1993). The cognitive psychology of school learning (2a. ed.). Harpers Collins.
Cita Chicago (17th ed.)Gagné, Ellen D., Carol Walker Yekovich, i Frank R. Yekovich. The Cognitive Psychology of School Learning. 2a. ed. Nueva York: Harpers Collins, 1993.
Cita MLA (9th ed.)Gagné, Ellen D., et al. The Cognitive Psychology of School Learning. 2a. ed. Harpers Collins, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.