APA (7th ed.) Zitazioa
Koontz, D. R. (1990). The bad place (1st American ed.). G.P. Putnam's Sons.
Chicago Style (17th ed.) Zitazioa
Koontz, Dean R. The Bad Place. 1st American ed. New York: G.P. Putnam's Sons, 1990.
MLA (9th ed.) Zitazioa
Koontz, Dean R. The Bad Place. 1st American ed. G.P. Putnam's Sons, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.