Springer, 2012
eBooks
Sacks, Terrence J.
VGM Career Harizons , 1993
Buku Teks
Humphries, Judith
Kogan Page, 1994
Buku Teks
Whiteman, Lily Madeleine, author
[American Management Association, ], 2012
eBooks
Piotrowski, Katy, 1962-, author
JIST Works, 2009
Buku Teks