Cavaleri, Steven, author
Elsevier / Butterworth-Heinemann : Knowledge Management Consortium International Press, 2005
Buku Teks
Lambe, Patrick, author
Chandos Publishing, 2007
Buku Teks
Freeman, Richard B.
Prentice-Hall, 1972
Buku Teks
O`Brien, Dan, author
Polity Press, 2006
Buku Teks
Housel, Thomas, author
McGraw-Hill, 2001
Buku Teks