Campbell, D. L. (2016). The double life: A survivor's guide to transcend success and tragedy / by David Lee Campbell. 48HrBooks.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCampbell, David Lee. The Double Life: A Survivor's Guide to Transcend Success and Tragedy / by David Lee Campbell. Twinsburg, Ohio: 48HrBooks, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCampbell, David Lee. The Double Life: A Survivor's Guide to Transcend Success and Tragedy / by David Lee Campbell. 48HrBooks, 2016.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.