(1985). Globe General Services and Security Agency and GGC Marketing Services Unlimited. GGSSA.
Chicago-referens (17:e uppl.)Globe General Services and Security Agency and GGC Marketing Services Unlimited. Pasay City: GGSSA, 1985.
MLA-referens (9:e uppl.)Globe General Services and Security Agency and GGC Marketing Services Unlimited. GGSSA, 1985.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.