Não informado. (1976). Progress in Physical Geography. Edward Arnold.
Lua i Stíl Chicago (17ú heag.)Não informado. Progress in Physical Geography. London: Edward Arnold, 1976.
Lua MLA (8ú heag.)Não informado. Progress in Physical Geography. Edward Arnold, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.