Lone congressional district: Province of Isabela. BCS Geography Div. [19-n].
Chicagoスタイル(17版)引用形式Lone Congressional District: Province of Isabela. [Manila]: BCS Geography Div. [19-n].
MLA(9版)引用形式Lone Congressional District: Province of Isabela. BCS Geography Div. [19-n].
警告: この引用は必ずしも正確ではありません.