Smith, Vincent A.
The Clarendon Press, 1958
Buku Teks
Rawlison, H.G.
Frederick A Praeger, 1952
Buku Teks
Wheeler, Mortimer, Sir, author
The Syndics of the Cambridge University Press, 1960
Buku Teks
edited by Christian W. Troll.
Oxford University Press , 2003
Buku Teks
Banerjee, Anil Chandra
Macmillan, 1978
Buku Teks