Philippines. Bureau of Coast and Geodetic Survey. (1983). San Guillermo, Philippines. Bureau of Coast and Geodetic Survey.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPhilippines. Bureau of Coast and Geodetic Survey. San Guillermo, Philippines. Manila: Bureau of Coast and Geodetic Survey, 1983.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPhilippines. Bureau of Coast and Geodetic Survey. San Guillermo, Philippines. Bureau of Coast and Geodetic Survey, 1983.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.