Umiker, William
An Aspen , 1988
Buku Teks
McConnell, Charles R.
Jones & Bartlett Learning, 2015
Buku Teks
Ellis, Carol W.
[American Management Association, ], 2005
eBooks
Faulkner, Ann
Chapman & Hall, 1995
Buku Teks
Grove, Daniel W.
McGraw-Hill, 2003
Buku Teks