Kaplan, J. (2015). The gratitude diaries: How a year looking on the bright side can transform your life. Dutton.
Citace podle Chicago (17th ed.)Kaplan, Janice. The Gratitude Diaries: How a Year Looking on the Bright Side Can Transform Your Life. New York: Dutton, 2015.
Citace podle MLA (9th ed.)Kaplan, Janice. The Gratitude Diaries: How a Year Looking on the Bright Side Can Transform Your Life. Dutton, 2015.
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