Matthews, Janice R., author
Cambridge University Press, 2016
Buku Teks
McConnell, John H., author
[American Management Association;, ], 2011
eBooks
Drago, Carl, author
Blackwell Publishing, 2007
Buku Referensi
Ziegler, Kathleen, author
Rockport Publishers, 1994
Buku Referensi
Drago, Carl, author
Blackwell, 2014
Buku Teks