Seelye, Elwyn E.
John Wiley & Sons, 1951
Buku Teks
Twort, A. C., author
Arnold, 1995
Buku Teks
Urquhart, Leonard Church, editor
McGraw-Hill , 1950
Buku Teks
editor-in-chief, Leonard Church Urquhart
McGraw-Hill, 1959
Buku Referensi
Faculty of Civil Engineering, Universiti Teknologi Malaysia ,
Majalah, Jurnal, Buletin