Murphy, Lynne (2018-03-29). The Prodigal Tongue: The Love–Hate Relationship Between British and American English (на језику: енглески). Oneworld Publications. стр. 211. ISBN978-1-78607-270-2. „...the British are so particular about sandwiches that they use the word less than Americans do. In Britain, a sandwich is some filing between two slices of bread. Not a roll. Not a bagel. Not a baguette. Without sliced bread, it's not a sandwich. The American sandwich prototype is much like the British: savoury filings within two slices of bread. But American sandwiches are allowed to wander further from the prototype because they interpret the 'bread' requirement more loosely. An American sandwich can be on a roll, on a bagel, on a bun, on a croissant, and at breakfast time, on an English muffin...”
„What is a Sandwich? | British Sandwich Week”. British Sandwich & Food to Go Association. Архивирано из оригинала 25. 05. 2024. г. Приступљено 18. 5. 2022. „The British Sandwich Association defines a sandwich as: Any form of bread with a filling, generally assembled cold – to include traditional wedge sandwiches, as well as filled rolls, baguettes, pitta, bloomers, wraps and bagels. [...] There is much debate as to what constitutes a sandwich but burgers and other associate products are not considered to be a sandwich.”CS1 одржавање: Формат датума (веза)
Grosley, Londres (Neuchatel, 1770) and A Tour to London, or, New observations on England and its inhabitants, translated from the French by Thomas Nugent (London: Printed for Lockyer Davis) 1772; Hexmasters Faktoider: Sandwich: English quotes from Grosley 1772
„Consultorio gastronómico”. La Verdad Digital S.L. (на језику: шпански). Архивирано из оригинала 27. 8. 2007. г. Приступљено 21. 7. 2010.CS1 одржавање: Формат датума (веза)
„butty”. Oxford English Dictionary (3rd изд.). Oxford University Press. септембар 2005.CS1 одржавање: Формат датума (веза)(Потребна је претплата или чланска картица јавне библиотеке УК.) English regional (chiefly northern). Originally: a slice of bread spread with butter. Now: a filled sandwich; (also) an open sandwich. Frequently with modifying word denoting the filling or topping.
„What is a Sandwich? | British Sandwich Week”. British Sandwich & Food to Go Association. Архивирано из оригинала 25. 05. 2024. г. Приступљено 18. 5. 2022. „The British Sandwich Association defines a sandwich as: Any form of bread with a filling, generally assembled cold – to include traditional wedge sandwiches, as well as filled rolls, baguettes, pitta, bloomers, wraps and bagels. [...] There is much debate as to what constitutes a sandwich but burgers and other associate products are not considered to be a sandwich.”CS1 одржавање: Формат датума (веза)
„Consultorio gastronómico”. La Verdad Digital S.L. (на језику: шпански). Архивирано из оригинала 27. 8. 2007. г. Приступљено 21. 7. 2010.CS1 одржавање: Формат датума (веза)