APA-viite (7. p.)
Luthans, F., Youssef, C. M., & Avolio, B. J. (2007). Psychological capital: Developing the human competitive edge. Oxford University Press.
Chicago-viite (17. p.)
Luthans, Fred, Carolyn M. Youssef, ja Bruce J. Avolio. Psychological Capital: Developing the Human Competitive Edge. Oxford ; New York: Oxford University Press, 2007.
MLA-viite (9. p.)
Luthans, Fred, et al. Psychological Capital: Developing the Human Competitive Edge. Oxford University Press, 2007.
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