Hannan, Bill
George Allen and Unwin, 1985
Buku Teks
Holt, Rinehart and Winston, 1985
Buku Teks
edited by P.M.S. Hacker and J. Raz
Clarendon Press, 1988
Buku Teks
edited by Allan Cochrane, Chris Hamnett and Linda McDowell
Harper and Row, 1981
Buku Teks
Seth, Michael, author
University of Hawaii Press, 2002
Buku Teks