International encyclopedia of political science
SAGE Reference, 2011
 Buku Referensi
Encyclopedia of political economy : volume 2
edited by Phillip Anthony O'Hara
Routledge, 2001
 Buku Referensi
The continuum political encyclopedia of the Middle East
editor, Avraham Sela
Continuum, 2002
 Buku Referensi
Encyclopedia of social psychology : 1
Roy F. Baumeister, Kathleen D. Vohs, editors
Sage Publications, 2007
 Buku Referensi
Encyclopedia of linguistics : volume 1
Philipp Strazny, editor
Fitzroy Dearborn, 2005
 Buku Referensi