1. Blaine , C. Coupons Buy $244 Groceries July. 8, 1981
2. Gallo , A. T. Stucker Coupon Use in Food Marketing The National Food Review April 1978 12
3. Nielson Company Coupon Distribution and Redemption Patterns
4. Nigut , B. The Case Against Coupons Progressive Grocer May 1961 74
5. Sloane , M. Esther Peterson's War Against Coupons The National Supermarket Shopper September 1980 4 5