Herod, Andrew, author
Willey Black well, 2009
Buku Teks
Friedberg, Marcella Schmidt di , author
Routledge, 2018
Buku Teks
Short, John Rennie, author
Prentice-Hall, 2000
Buku Teks
edited by Steve Pile and Michael Keith
Routledge, 1997
Buku Teks
Jorgensen, Marianne
Sage, 2002
Buku Teks