Balje, O. E.
Wiley, 1981
Buku Referensi
edited by Earl Logan, Jr.
Marcel Dekker, Inc., 1994
Buku Referensi
edited by Earl Logan, Jr., Ramendra Roy
Marcel Dekker, 2003
Buku Referensi
Church, James C.
McGraw-Hill, 1979
Buku Referensi
American Society of Civil Engineers, 1987
Buku Referensi