1. Sandwich, n.2 the Oxford English Dictionary;Anonymous,1989
2. Bartlett, C., 2010. Mapping Waste in the Food & Drink Industry. Oakdene Hollins Research & Consultancy. Report for DEFRA and the Food and Drink Federation, November 2010.
3. Code of Practice and Minimum Standards for Sandwich Manufacturers (Producers);BSA,2007
4. Britain’S Favourite Sandwich Fillers By Market Share and how their Popularity Is Changing;BSA,2008
5. Britain’S Favourite Sandwiches;BSA,2010