ROBERT, S., & FLAHERTY, J. E. (1963). Basic facts of U.S. history. Collier Books.
Lua i Stíl Chicago (17ú heag.)ROBERT, Sobel, agus John E. FLAHERTY. Basic Facts of U.S. History. New York: Collier Books, 1963.
Lua MLA (9ú heag.)ROBERT, Sobel, agus John E. FLAHERTY. Basic Facts of U.S. History. Collier Books, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.