Mendelson, Martin
Pustaka Binawan Pressindo, 1997
Buku Referensi
McKnight-Trontz, Jennifer
Torrent Books, 2004
Buku Teks
Pirie, David B.
Roetledge, 1985
Buku Referensi
Kirkpatrick, Donald L.
American Society for Training & Development, 2006
eBooks
Dunham, Kelli S.
F.A. Davis Company, 2004
Buku Teks