Crystal, David.
The Cambridge Encyclopedia of The English Language / - 1st ed / - Cambridge CB2 1RP : Cambridge University Press , 1997 - p489 :
0-521-40179-8
Linguistics
P111K / N5
The Cambridge Encyclopedia of The English Language / - 1st ed / - Cambridge CB2 1RP : Cambridge University Press , 1997 - p489 :
0-521-40179-8
Linguistics
P111K / N5