McCarthy, Richard C., author
[American Library association;American Library association, American Library association], 2007
eBooks
Cotsakos, Christos M., author
Harper Business, 2000
Buku Teks
Walliman, Nicholas, author
Sage Publications Ltd , 2001
Buku Teks
Davenport, Dawn, author
Broadway Books, 2006
Buku Teks
Peacock, Janet L., auhtor
Oxford University Press, 2007
Buku Teks