edited by Graeme Barker
Routledge, 1999
Buku Referensi
edited by Peter G. Stone, Robert MacKenzie
Routledge, 1994
Buku Teks
Deetz, James
The Natural History, 1967
Buku Teks
Buchanan, Robert Angus, author
Penguin, 1972
Buku Teks
Palmer, Marilyn, author
English Heritage, 2012
Buku Teks