Miller, G. Tyler (George Tyler), 1931-, author
Wadsworth, 1997
Buku Teks
Broyles, Robert W., author
Aspen Systems, 1981
Buku Teks
Washington : Georgetown University Press
Majalah, Jurnal, Buletin
Goodman, Benny, author
Learning matters Ltd., 2008
Buku Teks
Noel, Emile
The Institute of the European Community, 1979
Buku Teks