Cohen, William A., author
American Management Association, 2006
eBooks
Tracy, Brian, author
American Management Association, 2010
eBooks
Cameron, Kim, 1946-2015, author
Berrett-Koehler, 2012
Buku Teks
Kouzes, James M., author
Jossey-bass, 2012
Buku Teks
Slater, Robert, author
Richard D. Irwin, 1994
Buku Teks