International Labour Office , 2015
Majalah, Jurnal, Buletin
International Labour Office
ILO (International Labour Organization), 2007
Buku Teks
Yong, H.E. Ong Keng, author
2006
Artikel Jurnal
Stetlana Ashmarina, Anabela Sarmento, Marek Vochozka; editor
Springer, 2020
Buku Teks
Siregar, Reza Y.
Institute of Southheast Asian Studies, 1997
Buku Teks