Lonely Planet. ISBN 1-74059-697-8. Laver, John. (1994). Principles of Phonetics. Cambridge University Press. ISBN 0-521-45655-X. Smalley, William A. (1994)
Publishing Company. p. 305. ISBN 90-272-1794-7. Suski, P.M. (2011). The Phonetics of Japanese Language: With Reference to Japanese Script. p. 1. Malatesha
ISBN 978-1-4058-8118-0. Collins, Beverley; Mees, Inger M. (1990). "The Phonetics of Cardiff English". In Coupland, Nikolas; Thomas, Alan Richard (eds.)
Retrieved 2013-06-29. David Crystal (2008), A Dictionary of Linguistics and Phonetics, 6th Edition, p. 481, Wiley Hadumod Bußmann (1998), Routledge Dictionary
babasahon, arog kan [ʃʊ̣ḍ] para sa pinahinghingan should. Principles of Phonetics. John Laver, 1994, Cambridge Textbooks in Linguistics. "Whisper to Alexa