APA ציטוט

Duncan, D. J. (1974). Programmed learning aid for retailing: Modern concepts and practices. Learning Systems Company.

Chicago Style (17th ed.) Citation

Duncan, Delbert J. Programmed Learning Aid for Retailing: Modern Concepts and Practices. Homewood, Illinois: Learning Systems Company, 1974.

ציטוט MLA

Duncan, Delbert J. Programmed Learning Aid for Retailing: Modern Concepts and Practices. Learning Systems Company, 1974.