APA (7 वां संस्करण) प्रशस्ति पत्र

(2000). Urban Road Projects Office (URPO), Department of Public Works and Highways. Sanggunian.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

"Urban Road Projects Office (URPO), Department of Public Works and Highways." Sanggunian 2000.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

"Urban Road Projects Office (URPO), Department of Public Works and Highways." Sanggunian, 2000.