Symposium on Appropriate Technology. November 30, 1976, Jakarta
Jakarta: University of Indonesia, 1977
Buku Teks
edited by S.S. Hsueh and M.K. Tadjudin
Universitas Indonesia , 1976
Buku Teks
Proccedings on symposium on appropriate technology
Universuty of Indonesia, 1976
Buku Referensi
Technology Review, Inc,
Majalah, Jurnal, Buletin
edited by Franklin A. Long
Ballinger, 1980
Buku Teks SO