Ryan, W. T. (1980). Programmed learning aid for principles of marketing. Learning systems Company.
Chicago Style (17th ed.) CitationRyan, William T. Programmed Learning Aid for Principles of Marketing. Learning systems Company, 1980.
MLA (8th ed.) CitationRyan, William T. Programmed Learning Aid for Principles of Marketing. Learning systems Company, 1980.
Warning: These citations may not always be 100% accurate.