Barnard, Alan, author
Cambridge University Press, 2016
Buku Teks SO
Revesz, G., author
Longman, 1956
Buku Teks SO
Kroeber
Harcourt, Brace and Company, 1948
Buku Teks SO
Terrell, John
Cambridge University PRess, 1988
Buku Teks
Ehrenberg, Margaret, author
British Museum Publications, 1989
Buku Teks