Darvill, Timothy
London Historic Building & Manuments Commission for England 1987
Buku Teks
Ottaway, Patrick
Routledge , 1992
Buku Teks
Bone, Robert G., author
Littlefield, Adam, 1957
Buku Teks
edited by John Miksic
Archipelago Press, [date of publication not identified]
Buku Teks
Caldwell, Wallace Everett, author
Holt, Rinehart and Winston, 1963
Buku Teks