Carpenter, T. p., Fennema, E., Franke, M. L., Levi, L., & Empson, S. B. Children's mathematics: Cognitively guided instruction (2a ed.).
Lua i Stíl Chicago (17ú heag.)Carpenter, Thomas páginas, Elizabeth Fennema, Megan Loef Franke, Linda Levi, agus Susan B. Empson. Children's Mathematics: Cognitively Guided Instruction. 2a ed.
Lua MLA (8ú heag.)Carpenter, Thomas páginas, et al. Children's Mathematics: Cognitively Guided Instruction. 2a ed.
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