Maddieson, Ian. 2008. Absence of Common Consonants. In: Haspelmath, Martin & Dryer, Matthew S. & Gil, David & Comrie, Bernard (eds.) The World Atlas of Language Structures Online. Munich: Max Planck Digital Library, chapter 18. Available online at http://wals.info/feature/18بایگانیشده در ۲۰۰۹-۰۶-۰۱ توسط Wayback Machine. Accessed on 2008-09-15.
web.archive.org
Maddieson, Ian. 2008. Absence of Common Consonants. In: Haspelmath, Martin & Dryer, Matthew S. & Gil, David & Comrie, Bernard (eds.) The World Atlas of Language Structures Online. Munich: Max Planck Digital Library, chapter 18. Available online at http://wals.info/feature/18بایگانیشده در ۲۰۰۹-۰۶-۰۱ توسط Wayback Machine. Accessed on 2008-09-15.
