ASCE, 1997
Buku Teks
University of South Wales, 1999
Buku Teks
edited by Donald O. Dusenberry and John R. Davie
American Society of Civil Engineers, 1998
Buku Teks
American Society of Civil Engineers, 1997
Buku Teks
American Society of Civil Engineers, 1997
Buku Referensi