American Association of Geographers. (1943). Professional Geographer. Association of American Geographers.
Lua i Stíl Chicago (17ú heag.)American Association of Geographers. Professional Geographer. Washington: Association of American Geographers, 1943.
Lua MLA (8ú heag.)American Association of Geographers. Professional Geographer. Association of American Geographers, 1943.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.