Rickels, Laurence A., author
University of Minnesota, 1999
Buku Teks
Smith, Lisa J., author
Atria, 2011
Buku Teks
Bligh, Donald A., author
Jossey-Bass, 2000
Buku Teks
Peter Cook [and others], editor
Wiley-Academy, 2001
Buku Teks
Thiagarajan, Sivasailam, author
American Society for Training and Development Press, 2005
eBooks