Meyerson, Denise, author
Routledge; Cavendish, 2007
Buku Teks
Fitzgerald, P.J.
Sweet & Maxwell, 1966
Buku Teks
Paton, George Whitecross
The Clarendon Press, 1953
Buku Teks
Bix, Brian H.
Sweet & Maxwell, 2012
Buku Teks
Chinhengo, Austin M.
Cavendish Publishing, 1995
Buku Teks