APA (7 वां संस्करण) प्रशस्ति पत्र

Villegas, B. M. (2005). The Need for foreign direct investments. IN Business and society [column]. Manila Bulletin.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Villegas, Bernardo M. "The Need for Foreign Direct Investments. IN Business and Society [column]." Manila Bulletin 2005.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Villegas, Bernardo M. "The Need for Foreign Direct Investments. IN Business and Society [column]." Manila Bulletin, 2005.