Constantino, Renato, author
Karrel, 1989
Buku Teks
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 1993
UI - Skripsi Membership
DeTuncq, Toni, author
American Society for Training & Development, 2012
eBooks
Forsyth, Patrick, author
Institution of Engineering and Technology, 2007
eBooks
Hills, Struart L.
McGraw-Hill , 1980
Buku Teks