Lua APA (7ú heag.)

Lidwell William,Holden K. (2010). Universal Principles of Design. Rock Port.

Lua i Stíl Chicago (17ú heag.)

Lidwell William,Holden K. Universal Principles of Design. USA: Rock Port, 2010.

Lua MLA (9ú heag.)

Lidwell William,Holden K. Universal Principles of Design. Rock Port, 2010.

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