APA (7th ed.) Zitazioa

Kaplan, J. (2015). The gratitude diaries: How a year looking on the bright side can transform your life. Dutton.

Chicago Style (17th ed.) Zitazioa

Kaplan, Janice. The Gratitude Diaries: How a Year Looking on the Bright Side Can Transform Your Life. New York: Dutton, 2015.

MLA (9th ed.) Zitazioa

Kaplan, Janice. The Gratitude Diaries: How a Year Looking on the Bright Side Can Transform Your Life. Dutton, 2015.