Keenam, Denis
Business law / Denis keenam & Sarah Riches
Pitman, 1993
 Buku Teks
Fox, Scott C.
Internet riches: the simple money-making secrets of online millionaires
American Management Association;, 2006
 eBooks
Fox, Scott C.
Internet riches: the simple money-making secrets of online millionaires
[American Management Association, ], 2008
 eBooks
Veevers-Carter, W.
Riches of the rain forest : an introduction to the trees and fruits of the Indonesian and Malaysian rain forests
Oxford University Press , 1984
 Buku Teks
Reed, Scott
The miracle of psycho-command power: the new way to riches, love, and happiness
N.Y Parker Pub. Co., 1972
 Buku Teks SO