Chomsky, Noam, author
Penguin in association with Chatto & Windus, 1969
Buku Teks
Appy, Christian G., author
Penguin, 2016
Buku Teks
Chomsky, Noam, author
Allen Unwin, 2003
Buku Teks
Macmillan Digital USA, 1995
Multimedia
Draper, Theodore, 1912-2006
Penguin Books, 1967
Buku Teks