Robson, L.L., author
Cambridge University Press, 1976
Buku Teks
Harris, robert
Faber and Faber, 1984
Buku Teks
Littlewood, Joan, 1914-
Methuen, 1994
Buku Teks
Darbishire, Helen, 1881-1961, author
Oxford University Press, 1949
Buku Teks
Longman, 1990
Buku Teks