Murphy, Tom, author
American Management Association, 2007
eBooks
Mair, Michael, author
NY Berkley Caliber/Berkley Books, 2014
Buku Teks
Shetterly, Margot Lee, author
An imprint of HarperCollins , 2016
Buku Teks
Ludvigsen, Karl E., author
Bentley Publishers, 2015
Buku Teks
Ministry of Communication and Information Technology
Ministry of Communication and Information Technology, 2014
Buku Teks