Better Homes and Gardens Books, 1997
Buku Teks SO
Sudjic, Deyan
Mitchell Beazley, 1986
Buku Referensi
Laughlin, Sara
American Library association, 2008
eBooks
edited by Cristina Paredes Beniftez
Page one, 2011
Buku Referensi
Dollin, Stuart
The Templar Company, 1992
Buku Referensi