Cahn, Steven M.
Harper & Row, 1971
Buku Teks
Graber, Mark A.
Oxford University Press, 2015
Buku Teks
Janet Marstine, editor
Blackwell Publishing, 2010
Buku Teks
Vaganay, Leon
Cambridge University Press, 1991
Buku Teks
Rafael Ball
Chandos Publishing, 2018
Buku Teks