Rubin, G. (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 (Unabridged.).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRubin, Gretchen. 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. Unabridged. 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRubin, Gretchen. 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. Unabridged. 2009.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.