Castro, E. R. (1998). Finally, free but quality pre-school education. Manila Bulletin.
Chicago-referens (17:e uppl.)Castro, Eddee RH. "Finally, Free but Quality Pre-school Education." Manila Bulletin 1998.
MLA-referens (9:e uppl.)Castro, Eddee RH. "Finally, Free but Quality Pre-school Education." Manila Bulletin, 1998.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.