De Leon, E. (1999). Mayon Volcano explodes anew. Manila Bulletin.
Chicagoスタイル(17版)引用形式De Leon, Ed. "Mayon Volcano Explodes Anew." Manila Bulletin 1999.
MLA(9版)引用形式De Leon, Ed. "Mayon Volcano Explodes Anew." Manila Bulletin, 1999.
警告: この引用は必ずしも正確ではありません.