APA (7th ed.) Citation
ebrary, Inc, Emmons, R. A., & McCullough, M. E. (2004). The psychology of gratitude. Oxford University Press.
Chicago Style (17th ed.) Citation
ebrary, Inc, Robert A. Emmons, and Michael E. McCullough. The Psychology of Gratitude. Oxford ; New York: Oxford University Press, 2004.
MLA (9th ed.) Citation
ebrary, Inc, et al. The Psychology of Gratitude. Oxford University Press, 2004.
Warning: These citations may not always be 100% accurate.