Hammer, Bjarne
Roads, 2014
Buku Referensi
Design Media Publishing Limited, 2010
Buku Referensi
Rowley, Jennifer
Clive Bingley , 1980
Buku Teks
William Miller; Rita M. Pellen
The Hawort Information Press, 2005
Buku Teks
Notess, Greg R.
Facet, 2012
Buku Teks