Não informado. (1907). Philippine Journal of Science. National Science Development Board.
Chicagoスタイル(17版)引用形式Não informado. Philippine Journal of Science. Manila: National Science Development Board, 1907.
MLA(8版)引用形式Não informado. Philippine Journal of Science. National Science Development Board, 1907.
警告: この引用は必ずしも正確ではありません.