Kaplan, J. (2015). The gratitude diaries: How a year looking on the bright side can transform your life. Dutton.
Citazione stile Chigago Style (17a edizione)Kaplan, Janice. The Gratitude Diaries: How a Year Looking on the Bright Side Can Transform Your Life. New York: Dutton, 2015.
Citatione MLA (9a ed.)Kaplan, Janice. The Gratitude Diaries: How a Year Looking on the Bright Side Can Transform Your Life. Dutton, 2015.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.