Hildebrandt, Darlene Myers, author
Computing Information Directoy, 1995
Buku Referensi
Blackwell, 2005
Buku Teks
Pitt-Francis, Joe, author
Springer, 2012
eBooks
Stern, Nancy, author
John Wiley & Sons, 1996
Buku Teks
Burnard, Philip, author
Chapman&Hall,, 1995
Buku Referensi