Zulfikar
Program Pascasarjana Universitas Indonesia, 2013
UI - Tesis (Membership)
Bacal, Robert
McGraw-Hill, 2004
Buku Referensi
Lubis, Ester Marini
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2014
UI - Tesis (Membership)
Novak, Clare
[American Society for Training & Development Press, American Society for Training & Development Press], 2000
eBooks
Santosa Wahyu Sudrajad
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2006
UI - Tesis (Membership)