Bieber, J. (2010). Never Say Never. [s. n.].
Lua i Stíl Chicago (17ú heag.)Bieber, Justin. Never Say Never. [s. n.], 2010.
Lua MLA (8ú heag.)Bieber, Justin. Never Say Never. [s. n.], 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.