Cullen, C. D. (2006). Graphic design that works: Secrets for successful logo, magazine, brochure, promotion, and identity design. Rockport.
Lua i Stíl Chicago (17ú heag.)Cullen, Cheryl Dangel. Graphic Design That Works: Secrets for Successful Logo, Magazine, Brochure, Promotion, and Identity Design. Gloucester, Mass: Rockport, 2006.
Lua MLA (9ú heag.)Cullen, Cheryl Dangel. Graphic Design That Works: Secrets for Successful Logo, Magazine, Brochure, Promotion, and Identity Design. Rockport, 2006.
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