Kristján Kristjánsson. (2013). Virtues and Vices in Positive Psychology (1.). Cambridge University Press.
Cita Chicago Style (17a ed.)Kristján Kristjánsson. Virtues and Vices in Positive Psychology. 1. Cambridge University Press, 2013.
Cita MLA (8a ed.)Kristján Kristjánsson. Virtues and Vices in Positive Psychology. 1. Cambridge University Press, 2013.
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