Lester, F. K., Jr. (2003). Teaching mathematics through problem solving: Prekendergarten-grade 6. NCTM.
Cita Chicago Style (17a ed.)Lester, Frank K., Jr. Teaching Mathematics Through Problem Solving: Prekendergarten-grade 6. Reston, VA: NCTM, 2003.
Cita MLA (9a ed.)Lester, Frank K., Jr. Teaching Mathematics Through Problem Solving: Prekendergarten-grade 6. NCTM, 2003.
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