Philippines Dept. of Public Works, Transportation and Communications. Report, 1972/1973-. Bureau of Print.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPhilippines Dept. of Public Works, Transportation and Communications. Report, 1972/1973-. Manila: Bureau of Print.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPhilippines Dept. of Public Works, Transportation and Communications. Report, 1972/1973-. Bureau of Print.
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