Requintina, R. R. (1997). Sin reiterates stand on Charter, turns 69 today. Manila Bulletin.
Lua i Stíl Chicago (17ú heag.)Requintina, Robert R. "Sin Reiterates Stand on Charter, Turns 69 Today." Manila Bulletin 1997.
Lua MLA (9ú heag.)Requintina, Robert R. "Sin Reiterates Stand on Charter, Turns 69 Today." Manila Bulletin, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.