Cohen, W. A. (1981). How to sell to the government: A step-by-step guide to success. John Wiley and Sons.
Chicago-referens (17:e uppl.)Cohen, William A. How to Sell to the Government: A Step-by-step Guide to Success. John Wiley and Sons, 1981.
MLA-referens (9:e uppl.)Cohen, William A. How to Sell to the Government: A Step-by-step Guide to Success. John Wiley and Sons, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.