Wilde, William H., author
Oxford University Press, 1994
Buku Referensi
Garland, Henry, author
Oxford University Press, 1995
Buku Referensi
Baines, Anthony, author
Oxford University Press, 1992
Buku Referensi
Walker, David M., author
Clarendon Press, 1980
Buku Referensi
Johson, Bruce, author
Oxford University Press, 1987
Buku Teks