Williams, N. (2019). This is happiness. Bloomsbury.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWilliams, Niall. This Is Happiness. London: Bloomsbury, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWilliams, Niall. This Is Happiness. Bloomsbury, 2019.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.