Blum, Jeanne Elizabeth
Mass Charles E.Tuttle, 1995
Buku Teks
Carlson, Karen J.
Harvard Universiy press , 1996
Buku Teks
Carlson, Karen J.
1996
Multimedia
Carlson, Karen J.
Harvard University Press, 1996
Multimedia
Livoti, Carol
American Management Association, 2009
eBooks