Vandenberg, Maritz, author
Academy Editions, 1996
Buku Teks
Buchholdt, H.A., author
Thomas Telford, 1999
Buku Teks
Vandenberg, Maritz, author
Academic Edition, 1997
Buku Teks
Krishna, Prem, author
McGraw-Hill, 1978
Buku Teks
Szabo, J., author
Ellis Horwood, 1984
Buku Teks