U. S. Bureau of Insular Affairs & iGLibrary (online resource). (1911). Summary of Commerce of the Philippine Islands. Photoduplication Service. University of the Philippines Library.
Chicagoスタイル(17版)引用形式U. S. Bureau of Insular Affairs , iGLibrary (online resource). Summary of Commerce of the Philippine Islands. Quezon City: Photoduplication Service. University of the Philippines Library, 1911.
MLA(9版)引用形式U. S. Bureau of Insular Affairs , iGLibrary (online resource). Summary of Commerce of the Philippine Islands. Photoduplication Service. University of the Philippines Library, 1911.
警告: この引用は必ずしも正確ではありません.