Surajaras, Patchara
Westview Press, 1992
Buku Teks SO
Visser, Hans G.
Edwar Elgar, 1995
Buku Teks SO
edited by Mahbub ul Haq, Inge Kaul, Isabelle Grunberg
Oxford University Press, 1996
Buku Teks SO
Coyle, Brian
Financial World, 2000
Buku Teks SO
Einzig, Paul, 1897-1973
Macmillan, 1970
Buku Teks SO