Martin, James, author
Prentice-Hall, 1987
Buku Teks SO
Meijer, Anton, author
John Wiley & Sons, 1988
Buku Teks
Oxborrow, Mike
McGraw-Hill, 1993
Buku Referensi
Neibauer, Alan, author
Elex Media Komputindo, 2001
Buku Teks
Bobola, Daniel T., author
Alpha Books, 1995
Buku Teks