Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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