Não informado. (1964). Programmed learning. Association for Programmed Learning.
Chicagoスタイル(17版)引用形式Não informado. Programmed Learning. London: Association for Programmed Learning, 1964.
MLA(8版)引用形式Não informado. Programmed Learning. Association for Programmed Learning, 1964.
警告: この引用は必ずしも正確ではありません.