Hamilton, C. V. (1982). American government. Scott, Foresman.
Lua i Stíl Chicago (17ú heag.)Hamilton, Charles V. American Government. Glenview, Ill: Scott, Foresman, 1982.
Lua MLA (9ú heag.)Hamilton, Charles V. American Government. Scott, Foresman, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.