Signs of the Times magazine. (1989). Successful sign design. Retail Reporting.
Chicago-referens (17:e uppl.)Signs of the Times magazine. Successful Sign Design. New York: Retail Reporting, 1989.
MLA-referens (9:e uppl.)Signs of the Times magazine. Successful Sign Design. Retail Reporting, 1989.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.