Untermann, Richard, author
Intermedia, 1983
Buku Teks
Levy, Sidney M., author
Mc Graw Hill, 2001
Buku Teks
Billings, Keith H., author
New York: Van Nostrand Reinhold, 1993,
Buku Referensi
Strom, Steven, author
Van Nostrand Reindhold, 1993
Buku Teks
Untermann, Richard, author
Intermedia, 1984
Buku Teks