1. Etiquette (2015). http://dictionary.com.reference.com/browse/etiquette.
2. Fox, K. (2004). Watching the English: The hidden rules of English behavior. London: Hodder & Stoughton.
3. Hitchings, H. (2013). Sorry! The English and Their Manners. London: Farrar Straus and Giroux.
4. Leech, G. (1996). Principles of Pragmatics. London, N.Y: Longman.
5. McKay, Sinclair (2013). Sorry. The English and Their Manners. http://www.telegraph.co.uk/culture/books/bookreviews/9793044/Sorry-The-English-and-their-Manners-by-Henry-Hitchings-review.html.