Kaplan, J. (2015). The gratitude diaries: How a year looking on the bright side can transform your life. Dutton.
Lua i Stíl Chicago (17ú heag.)Kaplan, Janice. The Gratitude Diaries: How a Year Looking on the Bright Side Can Transform Your Life. New York: Dutton, 2015.
Lua MLA (9ú heag.)Kaplan, Janice. The Gratitude Diaries: How a Year Looking on the Bright Side Can Transform Your Life. Dutton, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.