Podolinsky, Michael A, author
McGraw-Hill, 2011
Buku Teks
Christiansen, Rich, 1965-, author
McGraw-Hill, 2012
Buku Teks
Tracy, Brian, author
American Management Association, 2002
eBooks
Sharma, Robin, author
Free Press, 2010
Buku Teks
McHugh, Donald E., author
[American Management Association;, ], 2004
eBooks