Noyes Data Corporation (NDC) , 1995
Buku Teks
Windham, Mircea
Pustaka Solomon, 2010
Buku Teks
Martin, Dick, author
[American Management Association, ], 2005
eBooks
Dominick, Joseph R., author
McGraw-Hill, 2012
Buku Teks
Kolb, Robert W, author
Blackwell, 1997
Buku Teks