Cita APA (7th ed.)

Lidwell, W. (2003). Universal Principles of Design. Rockport.

Cita Chicago (17th ed.)

Lidwell, William. Universal Principles of Design. Massachusetts(U SA): Rockport, 2003.

Cita MLA (9th ed.)

Lidwell, William. Universal Principles of Design. Rockport, 2003.