De Leon, E. (2006). Mt Bulusan erupts; alert level 1 raised. Manila Bulletin.
Cita Chicago Style (17a ed.)De Leon, Ed. "Mt Bulusan Erupts; Alert Level 1 Raised." Manila Bulletin 2006.
Cita MLA (9a ed.)De Leon, Ed. "Mt Bulusan Erupts; Alert Level 1 Raised." Manila Bulletin, 2006.
Precaución: Estas citas no son 100% exactas.