Allendoerfer, C. B. (1971). Principles of arithmetic and geometry for elementary school teachers. Macmillan.
Chicago-viite (17. p.)Allendoerfer, Carl B. Principles of Arithmetic and Geometry for Elementary School Teachers. New York: Macmillan, 1971.
MLA-viite (8. p.)Allendoerfer, Carl B. Principles of Arithmetic and Geometry for Elementary School Teachers. Macmillan, 1971.
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