Argenti, John, author
Allen & Unwin, 1975
Buku Teks
Banks, Erik, author
John Wiley & Sons, 2003
Buku Teks
Scherling, Mark, auhtor
CRC Press, 2011
Buku Teks
Condliffe, Peter, author
Lexis lexis, 2012
Buku Teks
Yan, Bin, author
Post and Telecommunication, 1991
Buku Teks