Lee, J.D., author
Chapman & Hall, 1991
Buku Teks
Lee, J.D., author
D. Van Nostrand, 1968
Buku Teks
Vogel, Arthur I., author
The English Language Book Society, 1960
Buku Teks
Day, M. Clyde, author
Gadjah Mada University Press , 1987
Buku Teks
Heslop, R.B.
Elsevier, 1960
Buku Teks