Routledge , 1995
Buku Teks
Thomas Telford, 1998
Buku Teks
edited by M.J. Howes, D.V. Morgan
John Wiley & Sons, 1981
Buku Teks
edited by M.J. Howes, D.V. Morgan
John Wiley & Sons, 1982
Buku Teks
Maloney, Timothy J., author
Prentice-Hall, 1979
Buku Teks