Salmon, Michael
Winning more business in financial services : how to score big with referrals and networking
McGraw-Hill, 2012
 Buku Teks SO
Tuchman, Robert
Young guns: the fearless entrepreneur's guide to chasing your dreams and breaking out on your own
American Management Association;, 2009
 eBooks
Pugh, David G.
Powerful proposals: how to give your business the winning edge
American Management Association;, 2005
 eBooks
Minrath, William R.
How to run your own business and make it pay
D. Van Nostrand, 1956
 Buku Teks SO
Paulson, Edward
The complete ideal's guide starting your own business
Prenada Media, 2003
 Buku Teks SO