Jefkins, Frank William, author
Erlangga, 2004
Buku Teks
Henry, Nicholas
Prentice-Hall, 1975
Buku Teks
Lemay, Michael C., author
Wardsworth, 2006
Buku Teks
Oliver, Dawn, author
Pinter, A Cassell Imprint, 1996
Buku Teks
Usherwood, Bob, author
Library Association, 1981
Buku Teks