Intel, 1975
Buku Teks
Lord, Kenniston W.
Van Nostrand Reinhold, 1978
Buku Teks SO
edited by David R. Martinez, Robert A. Bond, M. Michael Vai
CRC Press, 2008
Buku Referensi
edited by Diane Kresh
American Library association, 2007
eBooks
Thomas, Harry E.
Prentice-Hall, 1970
Buku Referensi