Ferkiss, Victor C.
Braziller, 1969
Buku Teks
Chacko, George K, author
North-Holland , 1975
Buku Teks
Anderson, Stuart, author
[, Springer], 2012
eBooks
Edited Ashley W.Goldsworthy, Helen Meredith
The National information Technology Council, 1993
Buku Teks
Meisner, Maurice, author
Polity Press, 2007
Buku Teks