Gretchen Rubin (2009). “The Happiness Project: Or, Why I Spent a Year Trying to Sing in the Morning, Clean My Closets, Fight Right, Read Aristotle, and Generally Have More Fun”, p.14, Harper Collins
"Advice from Slate's 'Dear Prudence': Telling teens the truth, bridesmaid in white, no grief, mom is a bully and more". Live Chat, live.washingtonpost.com. May 2, 2011.