(1999). Philippine Ports Authority 25th anniversary. Manila Bulletin.
Chicagoスタイル(17版)引用形式"Philippine Ports Authority 25th Anniversary." Manila Bulletin 1999.
MLA(9版)引用形式"Philippine Ports Authority 25th Anniversary." Manila Bulletin, 1999.
警告: この引用は必ずしも正確ではありません.