Asiapac Books, 2002
Buku Teks
Christiansen, Rich, 1965-, author
McGraw-Hill, 2012
Buku Teks
Martin, Dick, 1946- , author
American Management Association;, 2012
eBooks
Williams, Venus, author
Amistad, 2010
Buku Teks
Carr, Albert Z., author
New American Library, 1968
Buku Teks