National Statistical Information Center. (2006). 2006 Philippine statistical yearbook. The National Statistical Information Center.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Statistical Information Center. 2006 Philippine Statistical Yearbook. Makati City: The National Statistical Information Center, 2006.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNational Statistical Information Center. 2006 Philippine Statistical Yearbook. The National Statistical Information Center, 2006.
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