(1985). Globe General Services and Security Agency and GGC Marketing Services Unlimited. GGSSA.
Citazione stile Chigago Style (17a edizione)Globe General Services and Security Agency and GGC Marketing Services Unlimited. Pasay City: GGSSA, 1985.
Citatione MLA (9a ed.)Globe General Services and Security Agency and GGC Marketing Services Unlimited. GGSSA, 1985.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.