Boehm, R. G. (1995). Glencoe world geography: A physical and cultural approach (4th ed.). Glencoe.
Lua i Stíl Chicago (17ú heag.)Boehm, Richard G. Glencoe World Geography: A Physical and Cultural Approach. 4th ed. New York: Glencoe, 1995.
Lua MLA (8ú heag.)Boehm, Richard G. Glencoe World Geography: A Physical and Cultural Approach. 4th ed. Glencoe, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.