Desmond Tutu. No Future Without Forgiveness. N.Y.: Doubleday, 1999.
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Adam Smith. The Theory of Moral Sentiments. 1759.
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Превосходный обзор работ о благодарности: Robert A. Emmons. Thanks: How the New Science of Gratitude Can Make You Happier. N.Y.: Houghton Miffl in, 2007.