Worcester, D. C. (1976). The Philippine Islands [microform]. University of the Philippines Library.
Lua i Stíl Chicago (17ú heag.)Worcester, Dean Conant. The Philippine Islands [microform]. Quezon City: University of the Philippines Library, 1976.
Lua MLA (9ú heag.)Worcester, Dean Conant. The Philippine Islands [microform]. University of the Philippines Library, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.