David Dalby, 1999/2000, The Linguasphere register of the world’s languages and speech communities. Observatoire Linguistique, Linguasphere Press. Volume 2. Oxford.[1]Diarsipkan 2020-02-07 di Wayback Machine.
David Dalby, 1999/2000, The Linguasphere register of the world’s languages and speech communities. Observatoire Linguistique, Linguasphere Press. Volume 2. Oxford.[1]Diarsipkan 2020-02-07 di Wayback Machine.