Jordan, P. D. (1958). The nature and practice of State and local history. Service Center for Teachers of History.
Lua i Stíl Chicago (17ú heag.)Jordan, Philip Dillon. The Nature and Practice of State and Local History. Washington: Service Center for Teachers of History, 1958.
Lua MLA (9ú heag.)Jordan, Philip Dillon. The Nature and Practice of State and Local History. Service Center for Teachers of History, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.