De Castro, C. (1999). UP Manila brings much-needed eye care service to rural areas. Philippine Star.
Lua i Stíl Chicago (17ú heag.)De Castro, Cookie. "UP Manila Brings Much-needed Eye Care Service to Rural Areas." Philippine Star 1999.
Lua MLA (9ú heag.)De Castro, Cookie. "UP Manila Brings Much-needed Eye Care Service to Rural Areas." Philippine Star, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.