Byers, T.J., author
Micro Text/McGraw-Hill Copublication, 1983
Buku Teks
Garland, Harry, author
Erlangga, 1984
Buku Teks
Veronis, Andrew, author
Reston Publishing, 1978
Buku Teks
Bolton, W. (William), 1933-, author
Longman , 2000
Buku Teks
Sinclair, Ian R.
Butterworth, 1981
Buku Teks