Rudden, Bernard, author
Clarendon Press, 1987
Buku Teks
Hunt, Pearson, author
Richard D. Irwin, [Date of publication not identified]
Buku Teks
Hall, Livingston, author
West Publishing, 1965
Buku Teks
Tillotson BA., John
Cavendish Publishing Limited, 1996
Buku Teks
Oxford University Press, 1993
Buku Teks