Cita APA (7th ed.)
Lidwell, W., Holden, K., & Butler, J. Universal Principles of Design: 100 Ways to Enchance Usability, Influence Perception, Increase Appeal, Make Better Design Decisions, and Teach through Design. Rockport.
Cita Chicago (17th ed.)
Lidwell, William, Kritina Holden, i Jill Butler. Universal Principles of Design: 100 Ways to Enchance Usability, Influence Perception, Increase Appeal, Make Better Design Decisions, and Teach Through Design. Gloucester, EUA: Rockport.
Cita MLA (9th ed.)
Lidwell, William, et al. Universal Principles of Design: 100 Ways to Enchance Usability, Influence Perception, Increase Appeal, Make Better Design Decisions, and Teach Through Design. Rockport.
Atenció: Aquestes cites poden no estar 100% correctes.