APA Zitierstil

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

Chicago Zitierstil

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

MLA Zitierstil

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

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.