Research and Education Association, 1987
Buku Teks
Research and Education Association, 1987
Buku Teks
Kiryakova, Virginia
The Longman Scientific & Technical, 1993
Buku Teks
Tan, Soo Tang
PWS, 1993
Buku Teks
Davis, Bill, author
Addison-Wesley, 1994
Buku Teks