Rockport publishers, Inc., 2008
Buku Referensi
Klimchuk, Marianne Rosner
John Wiley & Sons, 2012
Buku Teks
Daniels, Lawrence J., 1942-
[American Management Association;, ], 2013
eBooks
Herriott, Luke
Rockport publishers, Inc., 2009
Buku Referensi
Mitchell, Michael N.
Stata Press, 2012
Buku Teks