Davis, R. H., Alexander, L. T., & Yelon, S. L. (1974). Learning system design: An approach to the improvement of instruction. McGraw Hill Book.
Citace podle Chicago (17th ed.)Davis, Robert H., Lawrence T. Alexander, a Stephen L. Yelon. Learning System Design: An Approach to the Improvement of Instruction. Nueva York: McGraw Hill Book, 1974.
Citace podle MLA (9th ed.)Davis, Robert H., et al. Learning System Design: An Approach to the Improvement of Instruction. McGraw Hill Book, 1974.
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