Elton, G. (1967). The practice of history. Thomas Y.Cromwell Co..
Lua i Stíl Chicago (17ú heag.)Elton, G.R. The Practice of History. New York: Thomas Y.Cromwell Co., 1967.
Lua MLA (9ú heag.)Elton, G.R. The Practice of History. Thomas Y.Cromwell Co., 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.