Raz, Joseph, author
Oxford Univesity Press, 2009
Buku Teks
Perry, Michael J.
Oxford University Press , 1990
Buku Teks
Skubik, Daniel W.
Peter Lang , 1990
Buku Teks
Anderson, Owen J., author
Cambridge University Press, 2012
Buku Teks
Lee, Simon
Oxford University Press , 1986
Buku Teks