Roddy, H. J., & Gibbs, D. (1904). Philippine school geography. American Book.
Lua i Stíl Chicago (17ú heag.)Roddy, Henry Justin, agus David Gibbs. Philippine School Geography. New York: American Book, 1904.
Lua MLA (9ú heag.)Roddy, Henry Justin, agus David Gibbs. Philippine School Geography. American Book, 1904.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.