International encyclopedia of government and politics : volume 2
editor Frank N. Magill
Toppan Company, 1996
 Buku Referensi
Encyclopedia of government and politics : volume 1
edited by Mary Hawkesworth, Maurice Kogan
Routledge, 1992
 Buku Referensi
International encyclopedia of government and politics : volume 1
editor Frank N. Magill
Toppan Company, 1996
 Buku Referensi
International encyclopedia of political science
SAGE Reference, 2011
 Buku Referensi
Encyclopedia of library and information science : vol. 2
Marcell Dekker, 1968
 Buku Referensi