Williams, N., & Crowley, D. (2019). This is happiness (Unabridged.). W. F. Howes Ltd.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWilliams, Niall, और Dermot Crowley. This Is Happiness. Unabridged. Rearsby, Leicestershire: W. F. Howes Ltd, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWilliams, Niall, और Dermot Crowley. This Is Happiness. Unabridged. W. F. Howes Ltd, 2019.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.