APA (7 वां संस्करण) प्रशस्ति पत्र

Velasco, E. (2018). Bidding on for Clark airport operations, maintenance-BCDA. Daily Tribune.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Velasco, Ed. "Bidding on for Clark Airport Operations, Maintenance-BCDA." Daily Tribune 2018.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Velasco, Ed. "Bidding on for Clark Airport Operations, Maintenance-BCDA." Daily Tribune, 2018.