Pickering, G. W. (1967). The challenge to education. Watts.
Chicagoスタイル(17版)引用形式Pickering, George White. The Challenge to Education. London: Watts, 1967.
MLA(8版)引用形式Pickering, George White. The Challenge to Education. Watts, 1967.
警告: この引用は必ずしも正確ではありません.