APA (7th ed.) Citation

Winfrey, O. (2014). What I know for sure (First edition.). Flatiron Books.

Chicago Style (17th ed.) Citation

Winfrey, Oprah. What I Know for Sure. First edition. New York: Flatiron Books, 2014.

MLA (8th ed.) Citation

Winfrey, Oprah. What I Know for Sure. First edition. Flatiron Books, 2014.

Warning: These citations may not always be 100% accurate.