Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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