Fisher, J., & Kayes, G. (2018). This is a voice: 99 exercises to train, project and harness the power of your voice. Wellcome Collection.
Chicago-referens (17:e uppl.)Fisher, Jeremy, och Gillyanne Kayes. This Is a Voice: 99 Exercises to Train, Project and Harness the Power of Your Voice. London: Wellcome Collection, 2018.
MLA-referens (9:e uppl.)Fisher, Jeremy, och Gillyanne Kayes. This Is a Voice: 99 Exercises to Train, Project and Harness the Power of Your Voice. Wellcome Collection, 2018.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.