APA (7th ed.) Citation

Spergel, I. A. (1995). The youth gang problem: A community approach. Oxford University Press.

Chicago Style (17th ed.) Citation

Spergel, Irving A. The Youth Gang Problem: A Community Approach. New York [u.a.]: Oxford University Press, 1995.

MLA (8th ed.) Citation

Spergel, Irving A. The Youth Gang Problem: A Community Approach. Oxford University Press, 1995.