Yates, Christopher St. J.
Cassell Publisher, 1989
Buku Teks
McArthur, Thomas Burns, author
Oxford University Press, 1983
Buku Teks
Ewer, J.R.
Longman, 1969
Buku Teks
Foers, E.
Oxford University Press, 1957
Buku Teks
Yates, Paulene M.
Harper & Row, 1962
Buku Teks