MBR Consulting, Inc.
Prentice Hall of India, 1997
Buku Teks
Cohen, Sacha
[American Society for Training & Development Press, American Society for Training & Development Press], 2001
eBooks
Vaughan-Nichols, Steven J.
AP Professional, 1997
Buku Teks
Fakultas Teknik Universitas Indonesia, 1999
UI - Skripsi Membership
Collins, Heidi
[American Management Association, ], 2001
eBooks