Perkins, Dennis, author
Amacom, 2012
Buku Teks
Perkins, Dennis N.T., 1953-, author
Amacom, 2012
Buku Teks
Perkins, Dennis N.T., author
[American Management Association, ], 2000
eBooks
Smith, Jim, author
American Society for Training & Development, 2008
eBooks
Kelley, Tom, author
gramedia Pustaka utama, 2002
Buku Teks SO