Castells, Manuel, author
Wiley-Blackwell, 2010
Buku Teks
KEMENAKERTRANS,
Majalah, Jurnal, Buletin
Keohane, Robert O. (Robert Owen), 1941-, author
Longman, 2012
Buku Teks
Wood, Janet, author
Institution of Engineering and Technology, 2007
eBooks
Brown, James I., author
D.C. Heath, 1987
Buku Teks