ઢાંચો:ELL2
Keith Brown, સંપાદક (૨૦૦૫). Encyclopedia of Language and Linguistics (2 આવૃત્તિ). Elsevier. ISBN 0-08-044299-4.CS1 maint: ref=harv (link)
Keith Brown, સંપાદક (૨૦૦૫). Encyclopedia of Language and Linguistics (2 આવૃત્તિ). Elsevier. ISBN 0-08-044299-4.CS1 maint: ref=harv (link)