APA (7th ed.) Zitazioa
Claus, K. E., & Claus, J. The Sign user's guide: A marketing aid. Institute of Signage Research.
Chicago Style (17th ed.) Zitazioa
Claus, Karen E., eta James Claus. The Sign User's Guide: A Marketing Aid. Palo Alto, EUA: Institute of Signage Research.
MLA (9th ed.) Zitazioa
Claus, Karen E., eta James Claus. The Sign User's Guide: A Marketing Aid. Institute of Signage Research.
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