Brewerton, Paul
Sage, 2004
Buku Teks
edited by Catherine Cassel and Gillian Symon
Sage, 1995
Buku Teks
edited by Catherine Cassel and Gillian Symon
Sage, 1994
Buku Teks
Bobko, Philip, author
McGraw-Hill, 1995
Buku Teks
Evans, G.O., author
Taylor and Francis, 2009
Buku Teks