Sibley, D. Creating Geographies of Difference: David Sibley. Human geography today.(1999).
Lua i Stíl Chicago (17ú heag.)Sibley, David. "Creating Geographies of Difference: David Sibley." Human Geography Today.(1999) .
Lua MLA (8ú heag.)Sibley, David. "Creating Geographies of Difference: David Sibley." Human Geography Today.(1999), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.