Ryan, W. T. (1971). Programmed learning aid for principles of marketing. Learning systems company.
シカゴスタイル引用形Ryan, William T. Programmed Learning Aid for Principles of Marketing. Illinois: Learning systems company, 1971.
MLA引用形式Ryan, William T. Programmed Learning Aid for Principles of Marketing. Learning systems company, 1971.
警告: この引用は必ずしも正確ではありません.