Coast and Geodetic Survey & U.S. Department of Commerce. Gazetteer of the Philippine islands.
Citazione stile Chigago Style (17a edizione)Coast and Geodetic Survey e U.S. Department of Commerce. Gazetteer of the Philippine Islands.
Citatione MLA (9a ed.)Coast and Geodetic Survey e U.S. Department of Commerce. Gazetteer of the Philippine Islands.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.