Hilliard, Elizabeth
Windows and doors
Conran Octopus Lim, 1996
Buku Referensi
Hedges, Roy
Collecting a Debt
Grolier International, 1999
Buku Teks
Doyle, Roddy
The woman who walked into doors
Penguin Books, 1996
Buku Teks
Hall, John W.
Twelve doors to Japan
McGraw-Hill, 1965
Buku Teks
Rendell, Frank
Water and wastewater project development / Frank Rendell
Thomas Telford, 1999
Buku Teks