Não informado. (1977). Progress in Human Geography. Edward Arnold.
Lua i Stíl Chicago (17ú heag.)Não informado. Progress in Human Geography. London: Edward Arnold, 1977.
Lua MLA (8ú heag.)Não informado. Progress in Human Geography. Edward Arnold, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.