Cita APA (7th ed.)
Cornwell, P. D. (2006). At risk. G. P. Putnam's Sons.
Cita Chicago (17th ed.)
Cornwell, Patricia Daniels. At Risk. New York: G. P. Putnam's Sons, 2006.
Cita MLA (9th ed.)
Cornwell, Patricia Daniels. At Risk. G. P. Putnam's Sons, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.