American Society of Civil Engineers, 1990
Buku Referensi
American Society of Civil Engineers, 1988
Buku Referensi
American Society of Civil Engineers, 1991
Buku Referensi
Gaylord, Edwin H., author
McGraw-Hill, 1972
Buku Teks
Macginley, T. J., author
E. & F.N Spon, 1981
Buku Teks