Allison, S. T., & Goethals, G. R. (2011). Heroes: What they do & why we need them. Oxford University Press.

Allison, Scott T., and George R. Goethals. Heroes: What They Do & Why We Need Them. Oxford ; New York: Oxford University Press, 2011.

Allison, Scott T., and George R. Goethals. Heroes: What They Do & Why We Need Them. Oxford University Press, 2011.