Baumgartner, Wilfrid S.
Paris , International Chamber of Commerce
Buku Teks
Manser, W.A.P.
Cassell/Associated Business Programmes, 1973
Buku Teks
United Nations, 1986
Buku Teks
Yoshino, Michael Y., author
Harvard University Press, 1980
Buku Teks
Jusuf Panglaykim, 1922-1986, author
Yayasan Proklamasi, Centre for Strategic and International Studies, 1979
Buku Teks