@book {Crystal2008, title = {A Dictionary of Linguistics and Phonetics}, year = {2008}, publisher = {Blackwell}, organization = {Blackwell}, edition = {6}, address = {Oxford}, author = {Crystal, David} } @book {Crystal1995, title = {The Cambridge Encyclopedia of the English Language}, year = {1995}, publisher = {Cambridge University Press}, organization = {Cambridge University Press}, address = {Cambridge}, author = {Crystal, David} }