Silverman, George, author
Amacom, 2011
Buku Teks
Silverman, George, author
American Management Association, 2001
eBooks
Silverman, George, author
American Management Association;, 2011
eBooks
Niven, Paul R.
John Wiley & Sons, 2002
Buku Teks
Cameron, Kim, 1946-2015, author
Berrett-Koehler, 2012
Buku Teks