Winfrey, O. (2014). What I Know For Sure. Macmillan.
Lua i Stíl Chicago (17ú heag.)Winfrey, Oprah. What I Know For Sure. UK: Macmillan, 2014.
Lua MLA (9ú heag.)Winfrey, Oprah. What I Know For Sure. Macmillan, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.