edited by Franklin A. Long
Ballinger, 1980
Buku Teks
edited by S.S. Hsueh and M.K. Tadjudin
Universitas Indonesia , 1976
Buku Teks
Symposium on Appropriate Technology. November 30, 1976, Jakarta
Jakarta: University of Indonesia, 1977
Buku Teks
Proccedings on symposium on appropriate technology
Universuty of Indonesia, 1976
Buku Referensi
Rybczynski, Witold, author
Dorset Prism Press 1980, 1980
Buku Teks SO