APA aipamena

Winfrey, O. (2014). What I Know For Sure. Macmillan.

Chicago Style aipamena

Winfrey, Oprah. What I Know For Sure. UK: Macmillan, 2014.

MLA aipamena

Winfrey, Oprah. What I Know For Sure. Macmillan, 2014.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.