Shackelford, James F., author
Prentice-Hall, 1996
Buku Teks
Diterbitkan oleh, American Society of Civil Engineers
The Society, 1962
Buku Teks
Webber, N.B.
:Chapman and Hall, 1978
Buku Teks
Khanna, Prem Nath, author
Engineers? Publishers & Advertisers, 1981
Buku Referensi
Benjamin, Jack C., author
McGraw-Hill, 1970
Buku Teks