Wood, Anthony, 1923-, author
Longman, 1983
Buku Teks
Coon, Carleton S., author
Macmillan, 1948
Buku Teks
Wijnbergen, Sweder Van
Washington, D.C. World Bank c. 1983,
Buku Teks
United Nations , 1993
Buku Teks
Schippers, Frits
Technonet Asia, 1983
Buku Teks