Lloyd, Paul S., author
Bloomsbury Academic, 2015, 2015
Buku Teks
Barker, Ernest, author
Oxford University Press, 1942
Buku Teks
Clark, G.N.
Oxford, Clarendom , 1947
Buku Teks
J.M. Dent & Sons ltd, 1930
Buku Teks
Andrews, Jonathan; Briggs, Asa; Porter, Roy; Tucker, Penny; Waddington, Keir
Routledge, 1997
Buku Referensi