Parkhurst, Wiliam
How to Get publicity
Harper Business, 2000
 Buku Teks
Volkema, Roger
Leverage: how to get it and how to keep it in any negotiation
American Management Association;, 2006
 eBooks
Salmiah Alias
It?s how we see it : Malaysian anecdotes
Ameen Kreatif, 2011
 Buku Teks SO
McIntosh, Jane
The practical archaelogist: how we know what we know about the past
Checkmark Books, 1999
 Buku Referensi
Sexton, John
How free are we? : what the constitution says we can and cannot do
M. Evans and Company, 1986
 Buku Teks