Spring, J. H. (2004). American education (11th ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Spring, Joel H. American Education. 11th ed. Boston: McGraw-Hill, 2004.
Lua MLA (8ú heag.)Spring, Joel H. American Education. 11th ed. McGraw-Hill, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.