Morley, Michael, author
Palgrave, 2002
Buku Teks
White, Jon, author
Business Book Limited, 1991
Buku Referensi
Chan, Janis Fisher, author
[American Management Association;, ], 2007
eBooks
Lexis Nexis, 2009
Buku Teks
Rashelle S. Karp, editor
[American Library association, American Library association], 2002
eBooks