Channon, John, author
Penguin Books, 1995
Buku Referensi
Peter, author
Penguin, 1978
Buku Referensi
Pritchard, John, author
Viking, 1992
Buku Referensi
Bannock, G., author
Penguin Books, 1974
Buku Referensi
Thomas, Merlin, author
Penguin Books, 1985
Buku Referensi