Rubin, G. (2018). The happiness project, tenth anniversary edition: Or, why i spent a year trying to sing in the morning, clean my closets, fight right, read aristotle, and generally have more fun.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRubin, Gretchen. The Happiness Project, Tenth Anniversary Edition: Or, Why I Spent a Year Trying to Sing in the Morning, Clean My Closets, Fight Right, Read Aristotle, and Generally Have More Fun. 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRubin, Gretchen. The Happiness Project, Tenth Anniversary Edition: Or, Why I Spent a Year Trying to Sing in the Morning, Clean My Closets, Fight Right, Read Aristotle, and Generally Have More Fun. 2018.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.