The Encyclopedia of American facts and dates
editor, Gorton Carruth
Thomas Y. Growell, 1962
Buku Referensi
Encyclopedia of American history : erlarged and update
edited by Richard B. Morris
Harper and Row , 1965
Buku Referensi
Chronicle of America.
ECAM Publications, 1989
Buku Teks
Hudson, Robert V.
Mass media : a chronological encyclopedia of television, radio, motion pictures, magazines, newspapers, and books in the United States
Garland publishing, 1987
Buku Referensi
Dukes, Paul
The superpowers : a short history
Routledge, 2000
Buku Teks