Christie, David
UNSW Press, 1997
Buku Teks
Robinson, Derek
Churchill Livingstone, 1985
Buku Teks
Rothman, Kenneth J.
Oxford University Press, 2002
Buku Teks
Zhdanov, V.
Foreign Languages Publishing House, [date of publication not identified]
Buku Teks
Friedman, Gary D.
McGraw-Hill, 1980
Buku Teks