Hodgdon Bradley, J. (1960). World Geography (First edition.).
Lua i Stíl Chicago (17ú heag.)Hodgdon Bradley, John. World Geography. First edition. 1960, 1960.
Lua MLA (8ú heag.)Hodgdon Bradley, John. World Geography. First edition. 1960.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.