APA (7 वां संस्करण) प्रशस्ति पत्र

(2001). Aeronautics board allows PAL to collect surcharge. Manila Times.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

"Aeronautics Board Allows PAL to Collect Surcharge." Manila Times 2001.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

"Aeronautics Board Allows PAL to Collect Surcharge." Manila Times, 2001.