Florida, Richard L.
Basic Books, 2009
Buku Teks
Shure, Myrna B.
McGraw-Hill , 2005
Buku Teks
Murdin, Paul
Thames & Hudson, 2009
Buku Referensi
Chan, Janis Fisher
[American Management Association;, ], 2007
eBooks
Bennie, Michael
Elex Media Komputindo, 1996
Buku Teks