Erlande-Brandenburg, Alain
Thames and Hudson, [date of publication not identified]
Buku Teks
Baring-Gould, Sabine
Longman, 1906
Buku Teks
general editor, H.R. Loyn
Thames and Hudson, 1991
Buku Referensi
Salzman, L.F.
Oxford University Press, 1955
Buku Teks SO
Coote, Stephen
Penguin Group, 1988
Buku Teks SO