edited by Philip Collins
Macmillan Press, 1983
Buku Teks
Srivastava, R.S.L., author
Tata McGraw-Hill, 1980
Buku Teks
Cohn, P.M., author
John Wiley & Sons, 1979
Buku Teks
Gilhooly, Helen, author
Kesaint Blanc, 2010
Multimedia
Graham, Gaelle, author
Kesaint Blanc, 2012
Multimedia