Klein, Wolfgang
Routledge , 1997
Buku Teks
Bloomfield, Leonard, author
Holt, Rinehart and Winston, 1961
Buku Teks
Beard, Adrian, author
Routledge, 2004
Buku Teks
edited by Joseph H. Greenberg
MIT Press, 1966
Buku Teks
Chomsky, Noam, author
Cambridge University Press, 2007
Buku Teks