Campbell, D. L. (2016). The double life: A survivor's guide to transcend success and tragedy / by David Lee Campbell. 48HrBooks.
Lua i Stíl Chicago (17ú heag.)Campbell, David Lee. The Double Life: A Survivor's Guide to Transcend Success and Tragedy / by David Lee Campbell. Twinsburg, Ohio: 48HrBooks, 2016.
Lua MLA (8ú heag.)Campbell, David Lee. The Double Life: A Survivor's Guide to Transcend Success and Tragedy / by David Lee Campbell. 48HrBooks, 2016.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.