Lee, Grossman, author
Amacom, 1974
Buku Teks
edited by Jeanette Lancaster, Wade Lancaster
Mosby , 1982
Buku Teks
edited by Jeanette Lancaster and Wade Lancaster
Mosby , 1982
Buku Teks
Kotter, John P., 1947-, author
Harvard Business School Press, 2002
Buku Teks
Emerson, Tricia, author
American Society for Training & Development, 2011
eBooks