(1985). Globe General Services and Security Agency and GGC Marketing Services Unlimited. GGSSA.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGlobe General Services and Security Agency and GGC Marketing Services Unlimited. Pasay City: GGSSA, 1985.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGlobe General Services and Security Agency and GGC Marketing Services Unlimited. GGSSA, 1985.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.