Betten, F. S. (1924). Historical terms and facts: A reference book for students of history. Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)Betten, Francis S. Historical Terms and Facts: A Reference Book for Students of History. Boston ; New York [etc.]: Allyn and Bacon, 1924.
Lua MLA (8ú heag.)Betten, Francis S. Historical Terms and Facts: A Reference Book for Students of History. Allyn and Bacon, 1924.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.