The Chractered Institution of Building Services Engineers, 1991
Buku Teks
Whitehead, Randal, author
Rockport Publishers, 1999
Buku Referensi
Pritchard, David C., author
Longman, 1995
Buku Teks
Pritchard, David C., author
Longman, 1995
Buku Teks
Leslie, Russell P.
McGraw-Hill, 1996
Buku Teks