Geist, E. (2009). Children are born mathematicians: Supporting mathematical development, birth to age 8. Merrill/Pearson.
Chicagoスタイル(17版)引用形式Geist, Eugene. Children Are Born Mathematicians: Supporting Mathematical Development, Birth to Age 8. Upper Saddle River, N.J: Merrill/Pearson, 2009.
MLA(9版)引用形式Geist, Eugene. Children Are Born Mathematicians: Supporting Mathematical Development, Birth to Age 8. Merrill/Pearson, 2009.
警告: この引用は必ずしも正確ではありません.