Cita APA (7th ed.)
ebrary, Inc, Snyder, C. R., & Lopez, S. J. (2005). Handbook of positive psychology. Oxford University Press.
Cita Chicago (17th ed.)
ebrary, Inc, C. R. Snyder, i Shane J. Lopez. Handbook of Positive Psychology. New York: Oxford University Press, 2005.
Cita MLA (9th ed.)
ebrary, Inc, et al. Handbook of Positive Psychology. Oxford University Press, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.