Bodley, John H.
Mayfield Publishing, 1998
Buku Teks
edited by Lawrence E. Harrison, Samuel P. Huntington
Basic Books, 2000
Buku Teks
Aitchison, Jean, 1938-
Cambridge University Press, 2013
Buku Teks
Aitchison, Jean, 1938-
Cambridge University Press, 2001
Buku Teks
Franklin, Sarah
Routledge, 1997
Buku Teks