APA (7 वां संस्करण) प्रशस्ति पत्र

Perez, D. (1999). Steel firm was bound to fail. Manila Bulletin.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Perez, Delfin. "Steel Firm Was Bound to Fail." Manila Bulletin 1999.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Perez, Delfin. "Steel Firm Was Bound to Fail." Manila Bulletin, 1999.