APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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