The Arithmetic teachers, Smith, S. E., & Bckman, C. A. (1975). Games and puzzles for elementary and middle school mathematisc: Reading from the Arithmetic teacher. National Council of Teachers of Mathematics.
Citace podle Chicago (17th ed.)The Arithmetic teachers, Seaton E. Smith, a Carl A. Bckman. Games and Puzzles for Elementary and Middle School Mathematisc: Reading from the Arithmetic Teacher. Reston, Va: National Council of Teachers of Mathematics, 1975.
Citace podle MLA (9th ed.)The Arithmetic teachers, et al. Games and Puzzles for Elementary and Middle School Mathematisc: Reading from the Arithmetic Teacher. National Council of Teachers of Mathematics, 1975.
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