Jobber, David
Prentice-Hall, 2000
Buku Teks SO
Lambert, Brian W.
American Society for Training & Development, 2009
eBooks
Eades, Keith M.
Andi, 2005
Buku Teks SO
Garofalo, Gene
Prentice-Hall, 1994
Buku Referensi
Christensen, Mary, 1951-
[American Management Association;, ], 2013
eBooks