Norman, D. A. & Draper, S. W. 1986. User Centered System Design: New Perspectives on Human-computer Interaction. Hillsdale, NJ: Lawrence Erlbaum. https://jnd.org/user-centered-system-design-new-perspectives-on-human-computer-interaction/

Norman, D. A. 1986. The Design of Everyday Things. New York, NY: Doubleday Currency. https://jnd.org/the-design-of-everyday-things/