APA (7th ed.) Citation

Duncan, D. J., & Hollander, S. C. (1979). Programmed Learning Aid for Retailing Modern Concepts and practices (3rd. ed.). Learning Systems Company.

Chicago Style (17th ed.) Citation

Duncan, Delbert J., and Stanley C. Hollander. Programmed Learning Aid for Retailing Modern Concepts and Practices. 3rd. ed. Illinois: Learning Systems Company, 1979.

MLA (8th ed.) Citation

Duncan, Delbert J., and Stanley C. Hollander. Programmed Learning Aid for Retailing Modern Concepts and Practices. 3rd. ed. Learning Systems Company, 1979.