Bramer, George R.
Charles E. Merrill Publishing Company, 1981
Buku Teks
Greendwood, Jean
Oxford Oxford University Press, 1988
Buku Teks SO
Greendwood, Jean
Oxford Oxford University Press, 1988
Buku Teks SO
Daiches, David, editor
University Press , 1948
Buku Teks
Longman, 1995
Buku Teks