Cashman, Thomas J., author
California Anaheim, 1970
Buku Teks
Shelly, Gary B., author
Anaheim Publishing, 1970
Buku Teks
Paris : Larousse
Majalah, Jurnal, Buletin
New York : Cambridge University Press
Majalah, Jurnal, Buletin
Chomsky, Noam, author
Fontana/Collins , 1975
Buku Teks