Santiago, R. (1999). International year of older persons. Manila Bulletin.
Lua i Stíl Chicago (17ú heag.)Santiago, Roni. "International Year of Older Persons." Manila Bulletin 1999.
Lua MLA (9ú heag.)Santiago, Roni. "International Year of Older Persons." Manila Bulletin, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.