(1975). The Philippines: A brief historical and factual survey [microform]. Photoduplication Service,University of the Philippines.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रThe Philippines: A Brief Historical and Factual Survey [microform]. Quezon City: Photoduplication Service,University of the Philippines, 1975.
एमएलए (9वां संस्करण) प्रशस्ति पत्रThe Philippines: A Brief Historical and Factual Survey [microform]. Photoduplication Service,University of the Philippines, 1975.
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