SoetardjoUntang, M.Arnold, E.P.Soetadi, R.Ismail, SulaemanKertapati, Engkon(Southeast Asia Association of Seismology and Earthquake Engineering (SEASEE), 1985-06)
United Nations Economic and Social Commission for Asia and the Pacific (UNESCAP)(United Nations Economic and Social Commission for Asia and the Pacific (UNESCAP), 2009)