Sage Publications, 2002
Buku Teks
Harvest Wheatsheaf, 1993
Buku Teks
edited by Peter Dwyer, Sandra M I Shaw
Sage, 2013
Buku Teks
Huttman, Elizabeth Dickerson
McGraw-Hill , 1981
Buku Teks
edited and introduced by Andrew Shonfield and Stella Shaw
Heinemann Educational Books, 1972
Buku Teks