Business World. (2008). Business world top 1000 corporations in the Philippines. Business World.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBusiness World. Business World Top 1000 Corporations in the Philippines. Quezon City: Business World, 2008.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBusiness World. Business World Top 1000 Corporations in the Philippines. Business World, 2008.
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