Orton, A. (1992). Learning mathematics: Issues, theory and classroom practice (2nd ed.). Cassell.
Citace podle Chicago (17th ed.)Orton, Anthony. Learning Mathematics: Issues, Theory and Classroom Practice. 2nd ed. London: Cassell, 1992.
Citace podle MLA (9th ed.)Orton, Anthony. Learning Mathematics: Issues, Theory and Classroom Practice. 2nd ed. Cassell, 1992.
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