Style de citation APA

Ryan, W. T. (1971). Programmed learning aid for principles of marketing. Learning systems company.

Style de citation Chicago

Ryan, William T. Programmed Learning Aid for Principles of Marketing. Illinois: Learning systems company, 1971.

Style de citation MLA

Ryan, William T. Programmed Learning Aid for Principles of Marketing. Learning systems company, 1971.

Attention : ces citations peuvent ne pas être correctes à 100%.