Kennedy, L. M., Tipps, S., & Johnson, A. (2008). Guiding children's learning of mathematics. Thomson Wadsworth.
Lua i Stíl Chicago (17ú heag.)Kennedy, Leonard M., Steve Tipps, agus Art Johnson. Guiding Children's Learning of Mathematics. Thomson Wadsworth, 2008.
Lua MLA (8ú heag.)Kennedy, Leonard M., et al. Guiding Children's Learning of Mathematics. Thomson Wadsworth, 2008.
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