Koester, Almut, author
Routledge, 2006
Buku Teks
Chomsky, Noam, author
Cambridge University Press, 2007
Buku Teks
Beard, Adrian, author
Routledge, 2004
Buku Teks
Klein, Wolfgang
Routledge , 1997
Buku Teks
Diamond, A. S. (Arthur Sigismund)
Methuen , 1959
Buku Teks