Reys, R. E., Suydam, M. N., & Lindquist, M. M. (1995). Helping children learn mathematics (4th ed.). Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)Reys, Robert E., Marilyn N. Suydam, agus Mary Montgomery Lindquist. Helping Children Learn Mathematics. 4th ed. Boston: Allyn and Bacon, 1995.
Lua MLA (9ú heag.)Reys, Robert E., et al. Helping Children Learn Mathematics. 4th ed. Allyn and Bacon, 1995.
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