edited by Margo Todd
Routledge, 1995
Buku Teks
Reardon. Bernard M.G.
Longman, 1981
Buku Teks
Heale, Martin, author
Oxford University Press, 2016
eBooks
Coulton, G.G. (George Gordon), author
Macmillan; University Press, 1938
Buku Teks
Lundgren, Stefan, author
Quintessence publishing, 2008
Buku Teks