Erwiza Erman
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2017
Artikel Jurnal
edited by Tindara Addabbo and Giovanni Solinas
Springer, 2012
eBooks
Ehrenberg, Ronald G.
Pearsons Addison-Wesley , 2009
Buku Teks SO
McConnell, Campbell R.
McGraw-Hill, 1989
Buku Teks SO
International Labour Office, 2017
Majalah, Jurnal, Buletin