Stampa:SOWL
Ladefoged, Peter; Maddieson, Ian (1996). The Sounds of the World's Languages (në anglisht). Oxford: Blackwell. ISBN 978-0-631-19815-4.
Ladefoged, Peter; Maddieson, Ian (1996). The Sounds of the World's Languages (në anglisht). Oxford: Blackwell. ISBN 978-0-631-19815-4.
