APA (7th ed.) Zitazioa
Spergel, I. A. (1995). The youth gang problem: A community approach. Oxford University Press.
Chicago Style (17th ed.) Zitazioa
Spergel, Irving A. The Youth Gang Problem: A Community Approach. New York: Oxford University Press, 1995.
MLA (9th ed.) Zitazioa
Spergel, Irving A. The Youth Gang Problem: A Community Approach. Oxford University Press, 1995.
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