De Blij, H. J., & Muller, P. O. (2010). Geography: Realms, regions, and concepts (14th ed.). Wiley.
Lua i Stíl Chicago (17ú heag.)De Blij, Harm J., agus Peter O. Muller. Geography: Realms, Regions, and Concepts. 14th ed. Hoboken, N.J: Wiley, 2010.
Lua MLA (9ú heag.)De Blij, Harm J., agus Peter O. Muller. Geography: Realms, Regions, and Concepts. 14th ed. Wiley, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.