Ulrich, David, 1953-, author
John wiley & Sons, Inc, 2003
Buku Teks
Ulrich, Dave
McGraw-Hill, 2013
Buku Teks
Tuleja, Tad
Facts On File Publications, 1985
Buku Teks
Baker, William F., author
American Management Association;, 2008
eBooks
SHRM, 2008
Buku Teks