Johnston, R. J. (1979). Geography and geographers: Anglo-american human geography since 1945. Edward Arnold.
Lua i Stíl Chicago (17ú heag.)Johnston, R. J. Geography and Geographers: Anglo-american Human Geography Since 1945. London: Edward Arnold, 1979.
Lua MLA (9ú heag.)Johnston, R. J. Geography and Geographers: Anglo-american Human Geography Since 1945. Edward Arnold, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.