Fakultas Teknik Universitas Indonesia, 1996
UI - Skripsi (Membership)
Reitman, Annabelle, author
American Society for Training & Development, 2006
eBooks
Anggoro Adhy Wijoyo, author
Universitas Indonesia, 2000
UI - Skripsi (Membership)
Paul, Richard W.
Prentice-Hall, 2002
Buku Teks
John Wiley & Sons, 2003
eBooks