Indonesian Mining Journal
Directorate General of Mines, 1997
 Majalah, Jurnal, Buletin
Proceedings of international conference on mining and the environment : Bandung, Indonesia, July 2-4, 1991
Department of Mining Engineering, ITB , 1992
 Buku Referensi
Review of geological and mining condition at Ombilin, Indonesia, in comparison with those at other collieries, in Australia and the United Kingdom
 Artikel Jurnal
Handbook of distance education
edited by Michael Grahame Moore, William G. Anderson
Lawrence Erlbaum Associates, 2003
 Buku Teks
Bates, Tony, 1939-
Technology, E-learnig and distance education
Routledge, 2005
 Buku Teks