Triyani
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2016
UI - Tesis Membership
Russell, Jeffrey
American Society for Training & Development, 2006
eBooks
Reddy, C. S.
Tata McGraw-Hill, 1994
Buku Teks
American Institute of Steel Construction, 1995
Buku Teks
Moningka, Yushak
Fakultas Teknik Universitas Indonesia, 2012
UI - Skripsi Open