O`Flaherty, Hal
Jajasan Lembaga Pers dan Pendapat Umum, 1957
Buku Klasik
Paneth, Donald
Facts on File, 1983
Buku Referensi
Bartov, Merwin
Funk Wagnalis Company, 1952
Buku Teks
Kovach, Bill
Three Rivers Press, 2014
Buku Teks
Emery, Edwin, editor
Prentice-Hall, 1962
Buku Teks