Frieden, Jeffry A., author
Routledge, 1997
Buku Teks
Frohlich, Norman
Prentice-Hall, 1987
Buku Teks
edited by George T. Crane and Abla Amawi
Oxford University Press, 1997
Buku Teks
Ulrichsen, Kristian, author
Palgrave Macmillan, 2016
Buku Teks
Choudhury, Masudul Alam, 1948-, author
Routledge, 1997
Buku Teks