Shumway, R. J. (1980). Research in mathematics education. National Council of Teachers of Mathematics.
Chicago-viite (17. p.)Shumway, Richard J. Research in Mathematics Education. Reston, Va.: National Council of Teachers of Mathematics, 1980.
MLA-viite (8. p.)Shumway, Richard J. Research in Mathematics Education. National Council of Teachers of Mathematics, 1980.
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