Paton, George Whitecross
The Clarendon Press, 1955
Buku Teks
Paton, G. W
Clarendon Press,, 1964
Buku Teks
Suri Ratnapala
Cambridge University Press, 2009
Buku Teks
Posner, Richard A.
Harvard University Press, 2000
Buku Teks
Meyerson, Denise
Routledge; Cavendish, 2007
Buku Teks