Johnston, C. (1987). Developmental mathematics (2nd ed.). Wadsworth.
Chicagoスタイル(17版)引用形式Johnston, C.L. Developmental Mathematics. 2nd ed. Belmont, Calif: Wadsworth, 1987.
MLA(9版)引用形式Johnston, C.L. Developmental Mathematics. 2nd ed. Wadsworth, 1987.
警告: この引用は必ずしも正確ではありません.