Brown, Daniel W., author
Wiley Balckwell, 2017
Buku Teks
Graber, Mark A., author
Oxford University Press, 2015
Buku Teks
Cahn, Steven M., author
Harper & Row, 1971
Buku Teks
Vaganay, Leon, author
Cambridge University Press, 1991
Buku Teks
Rafael Ball
Chandos Publishing, 2018
Buku Teks