Harvard Business School Publishing Corporation, 2001
Buku Teks
editors, Marshall Goldsmith, Howard Morgan, Alexander J. Ogg
John Wiley & Sons, 2004
Buku Teks
Information Resources Management Association, editor.
IGI Global, 2012
Buku Referensi
McElroy, Mark W.
Butterworth-Heinemann, 2003
Buku Teks
Pollock, Roy
American Society for Training & Development, 2012
eBooks