Castro, E. R. (1998). Finally, free but quality pre-school education. Manila Bulletin.
Lua i Stíl Chicago (17ú heag.)Castro, Eddee RH. "Finally, Free but Quality Pre-school Education." Manila Bulletin 1998.
Lua MLA (9ú heag.)Castro, Eddee RH. "Finally, Free but Quality Pre-school Education." Manila Bulletin, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.