Wastewater treatment : evaluation and implementation : proceedings of Water Environment '94, a joint Institution of Civil Engineers and Institution of Water and Environment [i.e. Environmental] Management conference, held in London on 9-10 March 1994 / [edited by B.H. Rofe].

Seminar internasional sastra, film, dan pendidikan, 19-20 November 1993

Subregional seminar on teacher training in environmental education for Asia, 15-22 November 1987

Kongres Bahasa Indonesia VI : Jakarta 28 Oktober-2 November 1993

Seminar dua Hari: Beyond 50, 9-10 Agustus 1994 Jakarta Convention Centre Senayan, Jakarta / Himpunan Ahli Konstruksi Indonesia