Rosskopf, M. F., & Taback, S. (1971). Piagetian cognitve development research and mathematical education. National Council of Teachers of Mathematics.
Chicago-referens (17:e uppl.)Rosskopf, Myron F., och Stanley Taback. Piagetian Cognitve Development Research and Mathematical Education. Washington: National Council of Teachers of Mathematics, 1971.
MLA-referens (9:e uppl.)Rosskopf, Myron F., och Stanley Taback. Piagetian Cognitve Development Research and Mathematical Education. National Council of Teachers of Mathematics, 1971.
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