Foers, E.
Oxford University Press, 1957
Buku Teks
Farmer, R.D.T.
Blackwell Scientific Publ., 1977
Buku Teks
Rybak, Stephanie
Macmillan and Co., 1985
Buku Teks
edited by Gareth Williams, Martin Kenyon and Lynn Williams
Overseas Student Trust, 1987
Buku Referensi
Stanford, David R.
London, Sweet & Maxwell Limited
Buku Teks