Du Mas, Mark M.
MdM Books, 2010
Multimedia
Andrew I. Cohen, Christopher Heath Wellman.
Wiley Blackwell, 2014
Buku Teks SO
edited by Marco Grix, Tim Dare
Emerald, 2016
eBooks
Mdm Books, 2010
Multimedia
Altman, Matthew C
John Wiley & Sons, 2014
Buku Teks SO