Balaam, David N., 1950-, author
Pearson/Prentice Hall, 2005
Buku Teks
Balaam, David N., 1950-, author
Prentice-Hall, 1996
Buku Teks
edited by W. Ladd Hollist
Westview Press, 1985
Buku Teks
Ulrichsen, Kristian, author
Palgrave Macmillan, 2016
Buku Teks
edited by David Zweig and Chen Zhimin
Routledge, 2007
Buku Teks