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-Zitierstil (17. Ausg.)U. S. Bureau of Insular Affairs und iGLibrary (online resource). Summary of Commerce of the Philippine Islands. Quezon City: Photoduplication Service. University of the Philippines Library, 1911.
MLA-Zitierstil (9. Ausg.)U. S. Bureau of Insular Affairs und iGLibrary (online resource). Summary of Commerce of the Philippine Islands. Photoduplication Service. University of the Philippines Library, 1911.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.