Edgell, Stephen, author
Sage , 2012
Buku Teks
Strangleman, Tim, author
Routledge: Taylor & Francis Group, 2008
Buku Teks
Acdemic Press , 1979
Buku Teks
Watson, Tony J., author
Routledge, 1995
Buku Teks
Watson, Tony J., author
Routledge, 1995
Buku Teks