Lidwell, W., & Holden, K. (2003). Universal principles and design. Rockport Publishers.
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Chicago-čujuhus (17. p.)
Lidwell, Wiliiam, juo Kritina Holden. Universal Principles and Design. Beverly, Massachusetts: Rockport Publishers, 2003.
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MLA-čujuhus (9. p.)
Lidwell, Wiliiam, juo Kritina Holden. Universal Principles and Design. Rockport Publishers, 2003.
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