APA (7 वां संस्करण) प्रशस्ति पत्र

De Castro, C. (1999). UP Manila brings much-needed eye care service to rural areas. Philippine Star.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

De Castro, Cookie. "UP Manila Brings Much-needed Eye Care Service to Rural Areas." Philippine Star 1999.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

De Castro, Cookie. "UP Manila Brings Much-needed Eye Care Service to Rural Areas." Philippine Star, 1999.