Não informado. (2012). Human Geography. Institute for Human Geography.
Lua i Stíl Chicago (17ú heag.)Não informado. Human Geography. Boston, Mass: Institute for Human Geography, 2012.
Lua MLA (8ú heag.)Não informado. Human Geography. Institute for Human Geography, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.