Kibbee, Douglas A, author
Cambridge University Press,, 2016
Buku Teks
Montgomery, Martin, author
Routledge, 2007
Buku Teks
Muhlhausler, Peter, author
Routledge, 1996
Buku Teks
Barker, Chris, author
Sage , 2001
Buku Teks
Magnusson, Lynne, author
Cambridge University Press, 2004
eBooks