Cristalis, Irena, author
Palgrave Macmillan , 2009
Buku Teks
Paul Hainsworth, Stephen McCloskey, editor
Tauris Publishers, 2000
Buku Teks
Marker, Jamseed, author
McFarland, 2003
Buku Teks
Hendro Subroto, author
Pustaka Sinar Harapan, 1997
Buku Teks
CSIS, 1991
Buku Referensi