Cita APA (7th ed.)

Epstein, A. J., Call, G., & Jacobson, A. (2012). Circle of heroes. Harper.

Cita Chicago (17th ed.)

Epstein, Adam Jay, Greg Call, i Andrew Jacobson. Circle of Heroes. New York: Harper, 2012.

Cita MLA (8th ed.)

Epstein, Adam Jay, et al. Circle of Heroes. Harper, 2012.