Wheeler, W. B., & Becker, S. D. (1994). Discovering the American past: A look at the evidence (3rd ed.). Houghton Mifflin Co..
Lua i Stíl Chicago (17ú heag.)Wheeler, William Bruce, agus Susan D. Becker. Discovering the American Past: A Look at the Evidence. 3rd ed. Boston: Houghton Mifflin Co., 1994.
Lua MLA (8ú heag.)Wheeler, William Bruce, agus Susan D. Becker. Discovering the American Past: A Look at the Evidence. 3rd ed. Houghton Mifflin Co., 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.