Despite the association, Donald Duck's current voice actor Tony Anselmo reveals that buccal speech isn't how the character's voice is created: "Most people believe Donald's voice is created by squeezing air through the cheek. I can’t reveal how it’s actually done, but it is definitely not by squeezing air through your cheek. The Hanna Barbara character Yakky Doodle is done that way. Donald Duck is not."[7]
^Van Gilse, P. H. G. (1948). "Another Method of Speech without Larynx". Acta Oto-Laryngologica. 36 (sup78). Informa UK Limited: 109–110. doi:10.3109/00016484809122642. ISSN0001-6489.
^Diedrich, W. M.; Youngstrom, K. A. (1966). Alaryngeal Speech. Springfield, Ill: Thomas. OCLC347249.
^Bleile, Ken (2004). Manual of articulation and phonological disorders : infancy through adulthood. Clifton Park, NY: Thomson/Delmar Learning. p. 67. ISBN978-0-7693-0256-0. OCLC53369270.
^Smith, B. L. (1994). "Speech production, Atypical aspects," pp. 4221–4231 in The encyclopedia of language and linguistics. Ed. R. E. Asher. Oxford: Pergamon Press. ISBN978-0-08-035943-4.