Boyce, W. D. (1977). The Philippine Islands [microform]. Photoduplication Service, University of the Philippines Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBoyce, William Dickson. The Philippine Islands [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1977.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBoyce, William Dickson. The Philippine Islands [microform]. Photoduplication Service, University of the Philippines Library, 1977.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.