Boone, D. R. (1997). Is your voice telling on youn: How to find and use your natural voice (2nd ed.). Singular Pub. Group.
Lua i Stíl Chicago (17ú heag.)Boone, Daniel R. Is Your Voice Telling on Youn: How to Find and Use Your Natural Voice. 2nd ed. San Diego, Calif: Singular Pub. Group, 1997.
Lua MLA (9ú heag.)Boone, Daniel R. Is Your Voice Telling on Youn: How to Find and Use Your Natural Voice. 2nd ed. Singular Pub. Group, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.