1. Natural Language Semantics;Allan,2001
2. Euphemism and Dysphemism: Language Used as Shield and Weapon;Allan,1991
3. Forbidden Words: Taboo and the Censoring of Language;Allan,2006
4. The American Heritage Dictionary, 2000. Fourth ed. http://www.bartleby.com/61/.
5. Word Formation in Generative Grammar;Aronoff,1976