Faculty of Civil Engineering, Universiti Teknologi Malaysia ,
Majalah, Jurnal, Buletin
Twort, A. C.
Arnold, 1995
Buku Teks
Williams, Alan
Kaplan Education, 2005
Buku Teks
Urquhart, Leonard Church
McGraw-Hill , 1950
Buku Teks
editor-in-chief, Leonard Church Urquhart
McGraw-Hill, 1959
Buku Referensi