Não informado. (1953). Philippine Geographical Journal. Philippine Geographical Society.
Chicagoスタイル(17版)引用形式Não informado. Philippine Geographical Journal. Manila: Philippine Geographical Society, 1953.
MLA(8版)引用形式Não informado. Philippine Geographical Journal. Philippine Geographical Society, 1953.
警告: この引用は必ずしも正確ではありません.