Ehrenberg, Margaret
British Museum Publications, 1989
Buku Teks
Daniel, Glyn
Victoria: Penguin Books Australia, 1962
Buku Teks
Barnard, Alan
Cambridge University Press, 2016
Buku Teks SO
Johnstone, Paul
Routledge, 1988
Buku Teks
Pfeiffer, John E.
McGraw-Hill , 1977
Buku Teks