APA (7 वां संस्करण) प्रशस्ति पत्र

Villegas, B. M. (2002). Why contributions to SSS must increase. IN Business and society [column]. Manila Bulletin.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Villegas, Bernardo M. "Why Contributions to SSS Must Increase. IN Business and Society [column]." Manila Bulletin 2002.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Villegas, Bernardo M. "Why Contributions to SSS Must Increase. IN Business and Society [column]." Manila Bulletin, 2002.