Samsul Hilal
Universitas Indonesia, 2013
UI - Tesis (Membership)
Asean -Ec Energy Management Training and Research Centre, 1993,
Buku Referensi
Pohan, Hazairin
Jurnal Kajian Wilayah Eropa, 2008
Artikel Jurnal
Organisation for Economic Co-operation and Development
OECD, 1974
Buku Teks
edited by Thomas Easton
McGraw-Hill, 2012
Buku Teks