Cita APA (7th ed.)
Koontz, D. R. (1990). The bad place (1st American ed.). G.P. Putnam's Sons.
Cita Chicago (17th ed.)
Koontz, Dean R. The Bad Place. 1st American ed. New York: G.P. Putnam's Sons, 1990.
Cita MLA (9th ed.)
Koontz, Dean R. The Bad Place. 1st American ed. G.P. Putnam's Sons, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.