Norman, Sandy, author
Facet Publishing, 2004
Buku Teks
edited by Andrew Booth and Anne Brice
Facet Publishing, 2004
Buku Referensi
Yerbury, Hilary, author
University of Technology, 1992
Buku Referensi
Holmberg, Kim, author
Chandos Publishing, 2016
Buku Teks
Indiana Purdue University Press, 2014
Buku Teks