Yamsuan, B. R. S. (2003). Why does GSIS collect more moey from membeers when it has billions to spare? Philippine Star.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रYamsuan, Brian Raymund S. "Why Does GSIS Collect More Moey from Membeers When It Has Billions to Spare?" Philippine Star 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्रYamsuan, Brian Raymund S. "Why Does GSIS Collect More Moey from Membeers When It Has Billions to Spare?" Philippine Star, 2003.
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