Sperry Smith, S. (1997). Early childhood mathematics. Boston: Allyn and Bacon.
シカゴスタイル引用形Sperry Smith, Susan. Early Childhood Mathematics. Boston: Allyn and Bacon, 1997.
MLA引用形式Sperry Smith, Susan. Early Childhood Mathematics. Boston: Allyn and Bacon, 1997.
警告: この引用は必ずしも正確ではありません.