Santiago, R. (1999). International year of older persons. Manila Bulletin.
Chicagoスタイル(17版)引用形式Santiago, Roni. "International Year of Older Persons." Manila Bulletin 1999.
MLA(9版)引用形式Santiago, Roni. "International Year of Older Persons." Manila Bulletin, 1999.
警告: この引用は必ずしも正確ではありません.