Elsevier, 2006
Buku Teks
Atkinson, William Illsey, author
American Management Association, 2003
eBooks
Atkinson, William Illsey, author
Amacom, 2003
Buku Teks
Foster, Lynn E, author
Prentice-Hall, 2006
Buku Teks
Andrew T S Wee, editor
World Scientific , 2009
Buku Teks