Davis, R. H., Alexander, L. T., & Yelon, S. L. (1974). Learning system design: An approach to the improvement of instruction. McGraw-Hill.
Chicago Edition CitationDavis, Robert H., Lawrence T. Alexander, and Stephen L. Yelon. Learning System Design: An Approach to the Improvement of Instruction. New York: McGraw-Hill, 1974.
MLA Edition CitationDavis, Robert H., et al. Learning System Design: An Approach to the Improvement of Instruction. McGraw-Hill, 1974.
Warning: These citations may not always be 100% accurate.