Brown, G. C. (1981). The inaccessible earth. Allen & Unwin.
Lua i Stíl Chicago (17ú heag.)Brown, G. C. The Inaccessible Earth. London: Allen & Unwin, 1981.
Lua MLA (9ú heag.)Brown, G. C. The Inaccessible Earth. Allen & Unwin, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.