Montgomery, B.
The Word Publishing Comp, [date of publication not identified]
Buku Teks
Kelly, Paul
Angus and Robertson, 1985
Buku Teks SO
d`Alpuget, Blanche
Schwartz, 1984
Buku Teks SO
Maddox, Graham
Penguin Books, 1989
Buku Teks SO
Kennan, George F., 1904-
Little, Brown, 1967
Buku Teks