Ryan, William T. a Hermanson, Roger H., ed. Programmed learning aid for principles of marketing. 3rd ed. Homewood: Richard D. Irwin, 1980. xii, 255 s. Irwin programmed learning aid series.
Ryan, W. T., & Hermanson, R. H. (1980). Programmed learning aid for principles of marketing (3rd ed.). Homewood: Richard D. Irwin.
Styl ChicagoRyan, William T., and Roger H. Hermanson. Programmed Learning Aid for Principles of Marketing. 3rd ed. Homewood: Richard D. Irwin, 1980.
Citace podle MLARyan, William T., and Roger H. Hermanson. Programmed Learning Aid for Principles of Marketing. 3rd ed. Homewood: Richard D. Irwin, 1980.
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