Shetterly, Margot Lee, author
An imprint of HarperCollins , 2016
Buku Teks
Ludvigsen, Karl E., author
Bentley Publishers, 2015
Buku Teks
Murphy, Tom, author
American Management Association, 2007
eBooks
Ministry of Communication and Information Technology
Ministry of Communication and Information Technology, 2014
Buku Teks
oleh Mahmudi ... [and others]
Gramedia Pustaka Utama, 2011
Buku Teks