LEvy, M. (2008). VOLCANOES AND EARTQUAKES. Britannica.
Lua i Stíl Chicago (17ú heag.)LEvy, Michael. VOLCANOES AND EARTQUAKES. Britannica, 2008.
Lua MLA (8ú heag.)LEvy, Michael. VOLCANOES AND EARTQUAKES. Britannica, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.