Fellman, J. D. (2001). Human geography. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Fellman, Jerome D. Human Geography. McGraw-Hill, 2001.
Lua MLA (8ú heag.)Fellman, Jerome D. Human Geography. McGraw-Hill, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.