Coast and Geodetic Survey & U.S. Department of Commerce. Gazetteer of the Philippine islands.
Cita Chicago (17th ed.)Coast and Geodetic Survey i U.S. Department of Commerce. Gazetteer of the Philippine Islands.
Cita MLA (9th ed.)Coast and Geodetic Survey i U.S. Department of Commerce. Gazetteer of the Philippine Islands.
Atenció: Aquestes cites poden no estar 100% correctes.