Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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

Atenció: Aquestes cites poden no estar 100% correctes.