Não informado. (1969). Area. Institute of British Geographers.
Lua i Stíl Chicago (17ú heag.)Não informado. Area. London: Institute of British Geographers, 1969.
Lua MLA (8ú heag.)Não informado. Area. Institute of British Geographers, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.