Hart, A. B. (1918). School history of the United States. American Book Co..
Lua i Stíl Chicago (17ú heag.)Hart, Albert Bushnell. School History of the United States. New York: American Book Co., 1918.
Lua MLA (8ú heag.)Hart, Albert Bushnell. School History of the United States. American Book Co., 1918.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.