Weiner, E.S.C., compiler
Clarendon Press, 1993
Buku Referensi
Peters, Pam, author
Cambridge University Press, 2006
Buku Referensi
edited by N.S. Doniach
Oxford University Press, 1992
Buku Referensi
edited by N. S. Doniach
Clarendon Press; Oxford University Press, 1972
Buku Referensi
Partridge, Eric, 1894-1979, author
Penguin Books, 1982
Buku Teks