* Anderson, John M.; and Ewen, Colin J. (1987). Principles of dependency phonology. Cambridge: Cambridge University Press
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* Carr, Philip (2003). English Phonetics and Phonology: An Introduction. Massachusetts, USA; Oxford, UK; Victoria, Australia; Berlin, Germany: Blackwell Publishing. ISBN 978-0-631-19775-1
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* Lass, Roger (1998). Phonology: An Introduction to Basic Concepts. Cambridge, UK; New York; Melbourne, Australia: Cambridge University Press. p. 1. ISBN 978-0-521-23728-4. Consultado el 8 de enero de 2011Paperback ISBN 0-521-28183-0
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== Bibliografia ==
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* Clark, John; Yallop, Colin; Fletcher, Janet (2007). An Introduction to Phonetics and Phonology (3rd edición). Massachusetts, USA; Oxford, UK; Victoria, Australia: Blackwell Publishing. ISBN 978-1-4051-3083-7
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* Hale, Mark; Reiss, Charles (2008). The Phonological Enterprise. Oxford, UK: Oxford University Press. ISBN 978-0-19-953397-8
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* Hale, Mark; Reiss, Charles (2000). Substance abuse and dysfunctionalism: Current trends in phonology. Linguistic Inquiry 31: 157-169 (2000)