Cooper, Douglas
John & Sons, 2007
Buku Teks
Frederick E. Giesecke [and others]
Pearson education International, Prentice Hall, 2009
Buku Teks
Boundy, Albert W.
McGraw-Hill, 2008
Buku Teks
Schmidt, Engineering Otto
German: Laipzig, 1963
Buku Teks
Rachel Koh
Page one publishing pte ltd, 2010
Buku Teks