Ward, W. [. o. c. (2017). Singers' throat troubles: Their cause and cure. Norderstedt.
Lua i Stíl Chicago (17ú heag.)Ward, Whitfield. [from old catalog]. Singers' Throat Troubles: Their Cause and Cure. Hansebooks GmbH: Norderstedt, 2017.
Lua MLA (9ú heag.)Ward, Whitfield. [from old catalog]. Singers' Throat Troubles: Their Cause and Cure. Norderstedt, 2017.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.