Hooker, M. B., author
Oxford University Press, 1984
Buku Teks
edited by Clauspeter Hill, Jochen Hoerth
Konrad-Adenauer-Stiftung, 2008
Buku Teks
Friedrich-Ebert-Stiftung (FES), 2003
Buku Teks
Friedrich Ebert Stiftung, 2005
Buku Teks
Coedes, George, author
Univesity of California Press, 1969
Buku Teks