APA Edition Citation

Ryan, W. T., & Hermanson, R. H. (1971). Programmed learning aid for principles of marketing. Learning Systems Co..

Chicago Edition Citation

Ryan, William T., and Roger H. Hermanson. Programmed Learning Aid for Principles of Marketing. Illinois: Learning Systems Co., 1971.

MLA Edition Citation

Ryan, William T., and Roger H. Hermanson. Programmed Learning Aid for Principles of Marketing. Learning Systems Co., 1971.

Warning: These citations may not always be 100% accurate.