Philippines (Republic). Bureau of Mines. Report. [s.n.
Chicagoスタイル(17版)引用形式Philippines (Republic). Bureau of Mines. Report. Manila: [s.n.
MLA(8版)引用形式Philippines (Republic). Bureau of Mines. Report. [s.n.
警告: この引用は必ずしも正確ではありません.
APA(7版)引用形式