Ayres, James J., author
New York: John Wiley & Sons, 1990,
Buku Referensi
McKim, Amee R, author
Thomson West, 2009
Buku Teks
Gilson, Christopher C.
Aspen Systems Corporation, 1979
Buku Teks
Myerson, Jeremy, author
Gingko Press, 1999
Buku Teks SO
Brandt, Peter B., author
Whitney Library of Design, 1992
Buku Teks SO