Silbert, J., Carnine, D., & Stein, M. (1990). Direct instruction mathematics (2nd edition.). Merrill Pub.
Chicago Style (17th ed.) CitationSilbert, Jerry, Douglas Carnine, and Marcy Stein. Direct Instruction Mathematics. 2nd edition. Columbus, Ohio: Merrill Pub, 1990.
ציטוט MLASilbert, Jerry, et al. Direct Instruction Mathematics. 2nd edition. Merrill Pub, 1990.
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