Cita APA (7a ed.)

Kloepfer, J., & Wolfhard, S. (2011). Sludgment day. Harper.

Cita Chicago Style (17a ed.)

Kloepfer, John, y Steve Wolfhard. Sludgment Day. New York: Harper, 2011.

Cita MLA (8a ed.)

Kloepfer, John, y Steve Wolfhard. Sludgment Day. Harper, 2011.