Nietzel, Michael T., author
Prentice-Hall, 1998
Buku Teks
Page, Andrew C., author
Cambridge University Press, 2014
eBooks
Helen Beinart, Paul Kennedy, Susan Llewelyn, editor
BPS Blackwell, 2009
Buku Teks
Nietzel, Michael T., author
Prentice-Hall, 1987
Buku Teks
Nietzel, Michael T., author
Prentice-Hall, 1998
Buku Teks