Langford, P. (1987). Concept development in the primary school. Croom Helm.
Chicagoスタイル(17版)引用形式Langford, Peter. Concept Development in the Primary School. London ; New York: Croom Helm, 1987.
MLA(8版)引用形式Langford, Peter. Concept Development in the Primary School. Croom Helm, 1987.
警告: この引用は必ずしも正確ではありません.