Ferdon, E. N. Studies in ecuadorian geography.
Lua i Stíl Chicago (17ú heag.)Ferdon, Edwin N. Studies in Ecuadorian Geography.
Lua MLA (8ú heag.)Ferdon, Edwin N. Studies in Ecuadorian Geography.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.