Hilliard, Elizabeth
Windows and doors
Conran Octopus Lim, 1996
 Buku Referensi
Wals, Chad
Doors into poetry
Prentice-Hall, 1962
 Buku Teks SO
Hedges, Roy
Collecting a Debt
Grolier International, 1999
 Buku Teks
Rendell, Frank
Water and wastewater project development / Frank Rendell
Thomas Telford, 1999
 Buku Teks
Rendell, Jane
Art and architecture ; a place between / Jane Rendell
Palgrave Macmillan, 2008
 Buku Teks SO