Behrens, W.
United Nations Industrial Development Organization, 1991
Buku Referensi
Japan : Kyoto University, 2007,
Majalah, Jurnal, Buletin
Singapore : Taylor & Francis Ltd
Majalah, Jurnal, Buletin
Japan : Ritsumekan center for asia pacific studies ritsumekan asia pacific university Beppu, Oita-Ken, 2006,
Majalah, Jurnal, Buletin
The Japan Foundation
Japan Foundation, 2008
Buku Teks SO