Liu, Cheng
Prentice-Hall, 1997
Buku Teks SO
Kirkpatrick, Donald L.
American Society for Training & Development, 2007
eBooks
edited by Nicholas Benwell
Halsted Press, 1975
Buku Teks SO
Stanley, Julian C.
Prentice-Hall, 1972
Buku Teks
DeTuncq, Toni
American Society for Training & Development, 2012
eBooks