APA (7th ed.) Citation

(2006). What I know now: Letters to my younger self (1. ed.). Broadway Books.

Chicago Style (17th ed.) Citation

What I Know Now: Letters to My Younger Self. 1. ed. New York: Broadway Books, 2006.

MLA (9th ed.) Citation

What I Know Now: Letters to My Younger Self. 1. ed. Broadway Books, 2006.