Não informado. (1907). Mineral Resources. Philippine Bureau of Mines.
Lua i Stíl Chicago (17ú heag.)Não informado. Mineral Resources. Manila: Philippine Bureau of Mines, 1907.
Lua MLA (8ú heag.)Não informado. Mineral Resources. Philippine Bureau of Mines, 1907.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.