Mausnes, Judith S.
W.B. Saunders , 1985
Buku Teks
Robinson, Derek
Churchill Livingstone, 1985
Buku Teks
Rothman, Kenneth J., author
Oxford University Press, 2002
Buku Teks
Zhdanov, V., author
Foreign Languages Publishing House, [date of publication not identified]
Buku Teks
Friedman, Gary D., author
McGraw-Hill, 1980
Buku Teks