Cita APA (7th ed.)
Spergel, I. A. (1995). The youth gang problem: A community approach. Oxford University Press.
Cita Chicago (17th ed.)
Spergel, Irving A. The Youth Gang Problem: A Community Approach. New York: Oxford University Press, 1995.
Cita MLA (9th ed.)
Spergel, Irving A. The Youth Gang Problem: A Community Approach. Oxford University Press, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.