APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.