Duncan, D. J. (1979). Programmed learning aid for retailing: Modern concepts and ractices. Learning System.
Chicagoスタイル(17版)引用形式Duncan, Delbert J. Programmed Learning Aid for Retailing: Modern Concepts and Ractices. Homewood, III.: Learning System, 1979.
MLA(9版)引用形式Duncan, Delbert J. Programmed Learning Aid for Retailing: Modern Concepts and Ractices. Learning System, 1979.
警告: この引用は必ずしも正確ではありません.