APA-čujuhus (7. p.)
ebrary, Inc, Emmons, R. A., & McCullough, M. E. (2004). The psychology of gratitude. Oxford University Press.
Chicago-čujuhus (17. p.)
ebrary, Inc, Robert A. Emmons, juo Michael E. McCullough. The Psychology of Gratitude. Oxford ; New York: Oxford University Press, 2004.
MLA-čujuhus (9. p.)
ebrary, Inc, et al. The Psychology of Gratitude. Oxford University Press, 2004.
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