Simon, Jeffrey
Westview Press, 1985
Buku Teks
Morris, David Joseph, author
Pergamon Press, 1983
Buku Teks
Morris, David Joseph, author
Pergamon Press, 1977
Buku Teks
Tieman, Marco, author
GRIN Verlag, 2011
Buku Teks
Andrea Abdul Rahman Azzqy, author
2013
UI - Tesis Membership