APA (7th ed.) Zitazioa
(1985). Sign design: Contemporary graphic identity. Signs of the Times.
Chicago Style (17th ed.) Zitazioa
Sign Design: Contemporary Graphic Identity. Nueva York, EUA: Signs of the Times, 1985.
MLA (9th ed.) Zitazioa
Sign Design: Contemporary Graphic Identity. Signs of the Times, 1985.
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