Jedlicka, Allen D.
Frederick A. Praeger, 1977
Buku Teks SO
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
Symposium on Appropriate Technology. November 30, 1976, Jakarta
Jakarta: University of Indonesia, 1977
Buku Teks
Rybczynski, Witold
Dorset Prism Press 1980, 1980
Buku Teks SO