Hurt, Robert L.
McGraw - Hill - Irwin, 2008
Buku Teks
Quigley, Marian
IRM Press, 2005
Buku Teks
edited by Andrea M. Morrison
[American Management Association, ], 2008
eBooks
James Henri
Libraries Unlimited, 2005
Buku Teks
Shuman, Bruce A.
Libraries Unlimited, 2001
Buku Teks