Kukla, Andre, author
[publisher not identified], 2000
Buku Teks
Natanson, Maurice, author
Random House, 1963
Buku Teks
Benton, Ted, author
Design , 2001
Buku Teks
Kluwer Academic Publishers,
Majalah, Jurnal, Buletin
Bohman, James, author
Polity Press , 1991
Buku Teks