Hargett, J. L. (1971). List of selected maps of states and territories. National Archives, National Archives and Records Service.
Lua i Stíl Chicago (17ú heag.)Hargett, Janet L. List of Selected Maps of States and Territories. Washington: National Archives, National Archives and Records Service, 1971.
Lua MLA (8ú heag.)Hargett, Janet L. List of Selected Maps of States and Territories. National Archives, National Archives and Records Service, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.