International Engineering Consortium
Professional Education International, 1997
eBooks
Pozgar, George D., author
Jones & Bartllett, 2010
Buku Teks
edited by L. Lynn Hogue
An Aspen Publication, 1980
Buku Teks
edited by Rosalind S. Miller, and Helen Rehr
Prentice-Hall, 1983
Buku Teks
Reynolds, Amanda, author
Open universtity press , 2000
Buku Teks